2024-03-28T21:09:48Zhttps://kuscholarworks.ku.edu/oai/requestoai:kuscholarworks.ku.edu:1808/254572017-11-23T09:02:30Zcom_1808_109col_1808_110
ATLAS Collaboration
Aaboud, M.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Royon, Christophe
2017-11-22T18:41:13Z
2017-11-22T18:41:13Z
2016-08-31
Aaboud, M., Aad, G., Abbott, B. et al. Phys. Rev. D (2016) 94: https://doi.org/10.1103/PhysRevD.94.032011
http://hdl.handle.net/1808/25457
10.1103/PhysRevD.94.032011
Searches for exclusively produced W boson pairs in the process pp(γγ)→pW+W−p and an exclusively produced Higgs boson in the process pp(gg)→pHp have been performed using e±μ∓final states. These measurements use 20.2 fb− 1 of pp collisions collected by the ATLAS experiment at a center-of-mass energy √s= 8 TeV at the LHC. Exclusive production of W+W− consistent with the Standard Model prediction is found with 3.0σ significance. The exclusive W+W− production cross section is determined to be σ(γγ→W+W−→e±μ∓X)=6.9±2.2(stat)± 1.4 (sys) fb, in agreement with the Standard Model prediction. Limits on anomalous quartic gauge couplings are set at 95% confidence level as −1.7×10−6<aW0/Λ2<1.7× 10−6 GeV−2 and −6.4×10−6<aWC/Λ2<6.3×10−6 GeV−2. A 95% confidence-level upper limit on the total production cross section for an exclusive Higgs boson is set to 1.2 pb.
American Physical Society
© 2016 CERN, for the ATLAS Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
http://creativecommons.org/licenses/by/3.0/
openAccess
Particle Interactions
Hadron colliders
Measurement of exclusive γγ → WþW− production and search for exclusive Higgs boson production in pp collisions at s= 8 TeV using the ATLAS detector
Article
Royon, Christophe
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/153532019-04-12T14:45:56Zcom_1808_109col_1808_110
Baringer, Philip S.
Coppage, Don
Hebert, C.
2014-10-22T15:31:26Z
2014-10-22T15:31:26Z
2000-06-27
B. Abbott et al. ((DØ Collaboration)). (2000). "Limits on quark compositeness from high energy jets in p-bar p collisions at 1.8 TeV." Physical Review D, 62(03):031101. http://dx.doi.org/10.1103/PhysRevD.62.031101
1550-7998
http://hdl.handle.net/1808/15353
10.1103/PhysRevD.62.031101
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.62.031101.
Events in p-bar p collisions at s√=1.8TeV with total transverse energy exceeding 500 GeV are used to set limits on quark substructure. The data are consistent with next-to-leading order QCD calculations. We set a lower limit of 2.0 TeV at 95% confidence on the energy scale ΛLL for compositeness in quarks, assuming a model with a left-left isoscalar contact interaction term. The limits on ΛLL are found to be insensitive to the sign of the interference term in the Lagrangian.
American Physical Society
Limits on quark compositeness from high energy jets in p-bar p collisions at 1.8 TeV
Article
openAccess
Baringer, Philip S.
Coppage, Don
Hebert, C.
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/269622018-11-16T19:22:29Zcom_1808_109col_1808_110
CMS Collaboration
2018-10-23T18:42:52Z
2018-10-23T18:42:52Z
2017-09
Sirunyan, A.M., Tumasyan, A., Adam, W. et al. Eur. Phys. J. C (2017) 77: 578. https://doi.org/10.1140/epjc/s10052-017-5079-z
http://hdl.handle.net/1808/26962
https://doi.org/10.1140/epjc/s10052-017-5079-z
A data sample of events from proton–proton collisions with two isolated same-sign leptons, missing transverse momentum, and jets is studied in a search for signatures of new physics phenomena by the CMS Collaboration at the LHC. The data correspond to an integrated luminosity of 35.9fb−1, and a center-of-mass energy of 13TeV. The properties of the events are consistent with expectations from standard model processes, and no excess yield is observed. Exclusion limits at 95% confidence level are set on cross sections for the pair production of gluinos, squarks, and same-sign top quarks, as well as top-quark associated production of a heavy scalar or pseudoscalar boson decaying to top quarks, and on the standard model production of events with four top quarks. The observed lower mass limits are as high as 1500GeV for gluinos, 830GeV for bottom squarks. The excluded mass range for heavy (pseudo)scalar bosons is 350–360 (350–410)GeV. Additionally, model-independent limits in several topological regions are provided, allowing for further interpretations of the results.
Springer Verlag
© CERN for the benefit of the CMS collaboration 2017
Open Access
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
http://creativecommons.org/licenses/by/4.0/
openAccess
Search for physics beyond the standard model in events with two leptons of same sign, missing transverse momentum, and jets in proton–proton collisions at s√=13TeV
Article
Baringer, Philip, S.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/308042022-11-09T16:58:05Zcom_1808_7165com_1808_109col_1808_7166col_1808_110
Novikov, Alexander
Pétroff, Pierre
Royon, Christophe
2020-11-03T15:29:43Z
2020-11-03T15:29:43Z
2020-12-23
978-1-936153-23-7
http://hdl.handle.net/1808/30804
The 3rd World Summit on Exploring the Dark Side of the Universe (EDSU2020) (https://indico.cern.ch/event/801461/overview) took place from March 9 to 13 in the Guadeloupe Islands, a picturesque French archipelago in the Caribbean. This was the 3rd meeting in this series of workshops, with previous editions held in the Galapagos Islands and Guadeloupe. The workshop was attended by 89 participants from 27 countries, including a large number of students. During the entire workshop, more than 60 talks were presented and many discussion sessions were held.
These Proceedings contain research presented at the 3rd World Summit on Exploring the Dark Side of the Universe (EDSU2020), one of the major venues of interaction between cosmologists and particle physicists. Topics include Cosmological Microwave Background, Large Scale Structure, Inflation and Early Universe, Particle Astrophysics, Dark Matter and Dark Energy, and Particle Physics.
University of Kansas Libraries
Copyright of each chapter is held by the author. This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0)..
https://creativecommons.org/licenses/by/4.0/
openAccess
Proceedings of the 3rd World Summit on Exploring the Dark Side of the Universe (EDSU2020): March 9–13, 2020, Guadeloupe Islands
Book
oai:kuscholarworks.ku.edu:1808/213372018-12-17T18:04:03Zcom_1808_109col_1808_110
Aad, G.
Abajyan, T.
Abbott, B.
Abdallah, J.
Abdelalim, A. A.
Royon, Christophe
2016-08-15T19:00:04Z
2016-08-15T19:00:04Z
2013
The ATLAS Collaboration, Aad, G., Abajyan, T.,Measurement of the inclusive jet cross-section in pp collisions at √s=2.76 TeV and comparison to the inclusive jet cross-section at √s=7 TeV using the ATLAS detector, et al. Eur. Phys. J. C (2013) 73: 2509. doi:10.1140/epjc/s10052-013-2509-4
http://hdl.handle.net/1808/21337
10.1140/epjc/s10052-013-2509-4
The inclusive jet cross-section has been measured in proton–proton collisions at √s=2.76 TeV in a dataset corresponding to an integrated luminosity of 0.20 pb−1 collected with the ATLAS detector at the Large Hadron Collider in 2011. Jets are identified using the anti-kt algorithm with two radius parameters of 0.4 and 0.6. The inclusive jet double-differential cross-section is presented as a function of the jet transverse momentum pT and jet rapidity y, covering a range of 20≤pT<430 GeV and |y|<4.4. The ratio of the cross-section to the inclusive jet cross-section measurement at √s=7 TeV, published by the ATLAS Collaboration, is calculated as a function of both transverse momentum and the dimensionless quantity xT=2pT/√s, in bins of jet rapidity. The systematic uncertainties on the ratios are significantly reduced due to the cancellation of correlated uncertainties in the two measurements. Results are compared to the prediction from next-to-leading order perturbative QCD calculations corrected for non-perturbative effects, and next-to-leading order Monte Carlo simulation. Furthermore, the ATLAS jet cross-section measurements at √s=2.76 TeV and √s=7 TeV are analysed within a framework of next-to-leading order perturbative QCD calculations to determine parton distribution functions of the proton, taking into account the correlations between the measurements.
American Physical Society
© CERN for the benefit of the ATLAS collaboration 2013. This article is published with open access at Springerlink.com
openAccess
Measurement of the inclusive jet cross-section in pp collisions at √s=2.76 TeV and comparison to the inclusive jet cross-section at √s=7 TeV using the ATLAS detector
Article
Royon, Christophe
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/13642018-02-16T21:40:58Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Davis, Robin E. P.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
Zhou, X.
2007-04-11T21:14:17Z
2007-04-11T21:14:17Z
2000-01
Briere, RA, Behrens, BH, et al. Search for rare and forbidden eta ' decays. AMERICAN PHYSICAL SOC. January 2000. 84(1) : 26-30
http://publish.aps.org/
http://hdl.handle.net/1808/1364
We have searched for rare and forbidden decays of the eta' meson in hadronic events at the CLEO II detector. The search is conducted on 4.80 fb(-1) of e(+)e(-) collisions at 10.6 GeV center-of-mass energy at the Cornell Electron Storage Ring. We find no signals, and set 90% confidence level upper limits of their branching fractions: B(eta' --> e(+)e(-)eta) < 2.4 x 10(-3), B(eta' --> e(+)e(-) pi(0)) < 1.4 x 10(-3), B(eta' --> e(+)e(-) gamma) < 0.9 x 10(-3), and B(eta' --> e mu) < 4.7 x 10(-4). We also fit the matrix element of the eta' --> pi(+)pi(-) eta Dalitz plot with the parametrization \M\(2) = A\1 + alpha gamma\(2), where gamma is a linear function of the kinetic energy of the eta, and find Re(alpha) =-0.021 +/- 0.025.
en_US
AMERICAN PHYSICAL SOC
Search for rare and forbidden eta ' decays
Article
openAccess
oai:kuscholarworks.ku.edu:1808/193512019-04-12T14:55:31Zcom_1808_109col_1808_110
CMS Collaboration
TOTEM Collaboration
Sanders, Stephen J.
Bean, Alice
Baringer, Philip S.
Benelli, Gabriele
Murray, Michael J.
Wang, Quan
2015-12-30T19:12:02Z
2015-12-30T19:12:02Z
2014-10-29
CMS Collaboration, TOTEM Collaboration. "Measurement of pseudorapidity distributions of charged particles in proton–proton collisions at s√=8 TeV by the CMS and TOTEM experiments." The European Physical Journal C. October, 2014: v74(10). http://dx.doi.org/10.1140/epjc/s10052-014-3053-6.
http://hdl.handle.net/1808/19351
10.1140/epjc/s10052-014-3053-6
This is the published version.
Pseudorapidity (η) distributions of charged particles produced in proton–proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges |η|<2.2 and 5.3<|η|<6.4 covered by the CMS and TOTEM detectors, respectively. The data correspond to an integrated luminosity of L=45 μb−1. Measurements are presented for three event categories. The most inclusive category is sensitive to 91–96 % of the total inelastic proton–proton cross section. The other two categories are disjoint subsets of the inclusive sample that are either enhanced or depleted in single diffractive dissociation events. The data are compared to models used to describe high-energy hadronic interactions. None of the models considered provide a consistent description of the measured distributions.
Springer Verlag
Measurement of pseudorapidity distributions of charged particles in proton–proton collisions at s√=8 TeV by the CMS and TOTEM experiments
Article
openAccess
Bean, Alice
Baringer, Philip S.
Benelli, Gabriele
Murray, Michael J.
Sanders, Stephen J.
Wang, Quan
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/13652018-02-16T21:41:15Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Darling, C.
Davis, Robin E. P.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
Zhou, L.
2007-04-11T21:14:34Z
2007-04-11T21:14:34Z
1998-07
Bergfeld, T, Eisenstein, BI, et al. Observation of B+->omega K+ and search for related B decays modes. AMERICAN PHYSICAL SOC. July 1998. 81(2) : 272-276
http://publish.aps.org/
http://hdl.handle.net/1808/1365
We have searched for two-body charmless decays of B mesons to purely hadronic exclusive final states including omega or phi mesons using data collected with the CLEO II detector. With this sample of 6.6 x 10(6) B mesons we observe a signal for the omega K+ final state, and measure a branching fraction of B(B+ --> omega K+) = (1.51(-0.6)(+0.7) +/- 0.2) X 10(-5). We also observe some evidence for the phi K* final state, and upper limits are given for 22 other decay modes. These results provide the opportunity for studies of theoretical models and physical parameters. [S0031-9007(98)06568-5].
en_US
AMERICAN PHYSICAL SOC
Observation of B+->omega K+ and search for related B decays modes
Article
openAccess
oai:kuscholarworks.ku.edu:1808/178542019-04-12T14:51:11Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
McGivern, Carrie Lynne
Sekaric, Jadranka
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
Alverson, G.
2015-05-28T13:12:47Z
2015-05-28T13:12:47Z
2012-11-26
Abazov, V. M. et al. (2012). "Study of the decay B(0)(s)→J/ψf′(2)(1525) in μ(+)μ(−)K(+)K(−) final states." Physical Review D, 86(9):92011. http://www.dx.doi.org/10.1103/PhysRevD.86.092011.
http://hdl.handle.net/1808/17854
10.1103/PhysRevD.86.092011
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.86.092011.
American Physical Society
Study of the decay B(0)(s)→J/ψf′(2)(1525) in μ(+)μ(−)K(+)K(−) final states
Article
openAccess
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
McGivern, Carrie Lynne
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/152392019-04-12T14:47:07Zcom_1808_109col_1808_110
Baringer, Philip S.
2014-10-08T19:24:07Z
2014-10-08T19:24:07Z
1989-08-01
Baringer, Philip S. et al. (1989). "Production cross section and topological decay branching fractions of the τ lepton." Physical Review D, 1989(40):902. http://dx.doi.org/10.1103/PhysRevD.40.902
1550-7998
http://hdl.handle.net/1808/15239
10.1103/PhysRevD.40.902
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.40.902.
We report new measurements of the production cross section for the reaction e(+)e(−)→τ(+)τ(−) at s√=29 GeV, as well as the topological decay branching fractions of the τ lepton. The data were taken with the High Resolution Spectrometer at the SLAC e(+)e(−) colliding-beam facility PEP. The measured cross section yields Rττ=1.044±0.014±0.030 [where the first (second) error is statistical (systematic)], consistent with QED and corresponding to QED cutoff parameters of Λ+>129 GeV and Λ−>284 GeV at the 95% C.L. The fractions of τ decays into one and three charged particles are B1=0.864±0.003±0.003 and B3=0.135±0.003±0.003.
American Physical Society
Production cross section and topological decay branching fractions of the τ lepton
Article
openAccess
Baringer, Philip S.
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/346662023-08-01T06:05:27Zcom_1808_109col_1808_110
Jain, P.
Ralston, John P.
2023-07-31T14:01:32Z
2023-07-31T14:01:32Z
2008-04-28
P. Jain, J. P. Ralston. Direct determination of astronomical distances and proper motions by interferometric parallax. A&A, 484 3 (2008) 887-895. DOI: https://doi.org/10.1051/0004-6361:20078669
https://hdl.handle.net/1808/34666
10.1051/0004-6361:20078669
Aims. We discuss a new method for measuring the distances to astronomical objects and their transverse proper velocities.
Methods. The phenomenon of interferometric parallax identifies a component of 2- and 4-point amplitude and the intensity correlations that can be observed at frequencies ranging from radio to optical. The calculation hinges on terms depending on the source to receiver separation that are conventionally neglected in the Van Cittert-Zernicke theorem.
Results. Order of magnitude estimates find that the baselines of Earth-bound VLBI systems might be capable of measuring 10-100 kpc distance scales. In either the optical or radio regime, space-borne detectors with fine baseline control might resolve source distances of Gigaparsec order. We discuss the possibility that an independent distance ladder based directly on experimental measurement might be constructed on multiple scales.
EDP Sciences
© ESO, 2008
openAccess
Interferometric
Astrometry
Interferometers
Direct determination of astronomical distances and proper motions by interferometric parallax
Article
Ralston, John P.
Physics & Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/273712018-11-16T09:01:43Zcom_1808_109col_1808_110
ALICE Collaboration
2018-11-15T20:59:52Z
2018-11-15T20:59:52Z
2013-01-04
Abelev, B., Adam, J., Adamova, D., Adare, A. M., Aggarwal, M. M., Rinella, G. A., ... & Ahmad, N. (2013). Charge separation relative to the reaction plane in Pb-Pb collisions at s N N= 2.76 TeV. Physical review letters, 110(1), 012301.
http://hdl.handle.net/1808/27371
10.1103/PhysRevLett.110.012301
Measurements of charge-dependent azimuthal correlations with the ALICE detector at the LHC are reported for Pb-Pb collisions at √sNN=2.76 TeV. Two- and three-particle charge-dependent azimuthal correlations in the pseudorapidity range |η|<0.8 are presented as a function of the collision centrality, particle separation in pseudorapidity, and transverse momentum. A clear signal compatible with a charge-dependent separation relative to the reaction plane is observed, which shows little or no collision energy dependence when compared to measurements at RHIC energies. This provides a new insight for understanding the nature of the charge-dependent azimuthal correlations observed at RHIC and LHC energies.
IOP Publishing
This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
http://creativecommons.org/licenses/by/3.0/
openAccess
Charge separation relative to the reaction plane in Pb-Pb collisions at √sNN = 2.76 TeV
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/221032019-04-12T14:25:50Zcom_1808_109col_1808_110
Richard, Matthew Scott
Cravens, Thomas Edward
Wylie, C.
Webb, D.
Chediak, Q.
Perryman, R.
Mandt, K.
Westlake, J.
Waite, J. H., Jr.
Robertson, I. P.
Magee, B. A.
Edberg, N. J. T.
2016-12-01T19:11:52Z
2016-12-01T19:11:52Z
2015-02-03
Richard, M. S., Cravens, T. E., Wylie, C., Webb, D., Chediak, Q., Perryman, R., … Edberg, N. J. T. (2015). An empirical approach to modeling ion production rates in Titan’s ionosphere I: Ion production rates on the dayside and globally. Journal of Geophysical Research: Space Physics, 120(2), 1264–1280. doi:10.1002/2013ja019706
http://hdl.handle.net/1808/22103
10.1002/2013JA019706
Titan's ionosphere is created when solar photons, energetic magnetospheric electrons or ions, and cosmic rays ionize the neutral atmosphere. Electron densities generated by current theoretical models are much larger than densities measured by instruments on board the Cassini orbiter. This model density overabundance must result either from overproduction or from insufficient loss of ions. This is the first of two papers that examines ion production rates in Titan's ionosphere, for the dayside and nightside ionosphere, respectively. The first (current) paper focuses on dayside ion production rates which are computed using solar ionization sources (photoionization and electron impact ionization by photoelectrons) between 1000 and 1400 km. In addition to theoretical ion production rates, empirical ion production rates are derived from CH4, CH3+, and CH4+ densities measured by the INMS (Ion Neutral Mass Spectrometer) for many Titan passes. The modeled and empirical production rate profiles from measured densities of N2+ and CH4+ are found to be in good agreement (to within 20%) for solar zenith angles between 15 and 90°. This suggests that the overabundance of electrons in theoretical models of Titan's dayside ionosphere is not due to overproduction but to insufficient ion losses.
American Geophysical Union
©2014. American Geophysical Union. All Rights Reserved.
openAccess
An empirical approach to modeling ion production rates in Titan’s ionosphere I: Ion production rates on the dayside and globally
Article
Cravens, Thomas Edward
Curriculum and Teaching
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/221732018-02-12T22:01:38Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Murray, Michael J.
Sanders, Stephen J.
CMS Collaboration
2016-12-07T19:14:38Z
2016-12-07T19:14:38Z
2015-06-09
Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Bergauer, T., Dragicevic, M., … Ghete, V. M. (2015). Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method. The European Physical Journal C, 75(6). doi:10.1140/epjc/s10052-015-3454-1
http://hdl.handle.net/1808/22173
10.1140/epjc/s10052-015-3454-1
See PDF for abstract.
Springer Verlag
© CERN for the benefit of the CMS collaboration 2015.
openAccess
Search for a standard model Higgs boson produced in association with a top-quark pair and decaying to bottom quarks using a matrix element method
Article
Baringer, Philip S.
Bean, Alice
Murray, Michael J.
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/15172019-04-12T14:37:35Zcom_1808_109col_1808_110
Baringer, Philip S.
2007-05-04
2007-05-04
2000-03
Abbott, B, Abolins, M, et al. Differential production cross section of Z bosons as a function of transverse momentum at root s=1.8 TeV. PHYSICAL REVIEW LETTERS. March 2000. 84(13) : 2792-2797
http://hdl.handle.net/1808/1517
10.1103/PhysRevLett.84.2792
We present a measurement of the transverse momentum distribution of Z bosons produced in p (p) over bar collisions at root s = 1.8 TeV from data collected by the DO experiment at the Fermilab Tevatron Collider, We find good agreement between our results and current resummation calculations, and also use our data to extract nonperturbative parameters for a particular version of the resummation formalism. The resulting values are significantly more precise than obtained in previous determinations.
en_US
AMERICAN PHYSICAL SOC
Differential production cross section of Z bosons as a function of transverse momentum at root s=1.8 TeV
Article
openAccess
oai:kuscholarworks.ku.edu:1808/155322019-04-12T14:48:07Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Aguilo, E.
2014-11-04T17:20:29Z
2014-11-04T17:20:29Z
2009-05-14
V. M. Abazov et al. (D0 Collaboration). (2009). "Search for Charged Higgs Bosons Decaying into Top and Bottom Quarks in pp-bar Collisions." Physical Review Letters, 102(19):191802. http://dx.doi.org/10.1103/PhysRevLett.102.191802.
0031-9007
http://hdl.handle.net/1808/15532
10.1103/PhysRevLett.102.191802
This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.102.191802.
We describe a search for production of a charged Higgs boson, qq-bar′→H(+), reconstructed in the tb-bar final state in the mass range 180≤M(H+)≤300 GeV. The search was undertaken at the Fermilab Tevatron collider with a center-of-mass energy s√=1.96 TeV and uses 0.9 fb(−1) of data collected with the D0 detector. We find no evidence for charged Higgs boson production and set upper limits on the production cross section in the types I, II, and III two-Higgs-doublet models (2HDMs). An excluded region in the (M(H+,) tanβ) plane for type I 2HDM is presented.
American Physical Society
Search for Charged Higgs Bosons Decaying into Top and Bottom Quarks in pp-bar Collisions
Article
openAccess
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
Moulik, Tania
Wilson, Graham Wallace
Physics and Astronomy
fullparticipation
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/178972019-04-12T14:51:34Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Agnew, J. P.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
2015-05-28T20:35:07Z
2015-05-28T20:35:07Z
2014-04-18
Abazov, V. M. et al. (2014). "Measurement of the W Boson Production Charge Asymmetry in pp-bar→W+X→eν+X Events at s√=1.96 TeV." Physical Review Letters, 112(15):151803. http://www.dx.doi.org/10.1103/PhysRevLett.112.151803.
http://hdl.handle.net/1808/17897
10.1103/PhysRevLett.112.151803
This is the publisher's version, and is also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.112.151803.
We present a measurement of the W boson production charge asymmetry in pp-bar→W+X→eν+X events at a center of mass energy of 1.96 TeV, using 9.7 fb(−1) of integrated luminosity collected with the D0 detector at the Fermilab Tevatron Collider. The neutrino longitudinal momentum is determined by using a neutrino weighting method, and the asymmetry is measured as a function of the W boson rapidity. The measurement extends over wider electron pseudorapidity region than previous results and is the most precise to date, allowing for precise determination of proton parton distribution functions in global fits.
American Physical Society
Measurement of the W Boson Production Charge Asymmetry in pp-bar→W+X→eν+X Events at s√=1.96 TeV
Article
openAccess
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/211842018-12-13T18:15:57Zcom_1808_109col_1808_110
Han, Tao
Lewis, Ian M.
McElmurry, Thomas
2016-07-27T15:49:28Z
2016-07-27T15:49:28Z
2010-01-29
Han, T., Lewis, I. & McElmurry, T., QCD corrections to scalar diquark production at hadron colliders, J. High Energ. Phys. (2010) 2010: 123. doi:10.1007/JHEP01(2010)123
http://hdl.handle.net/1808/21184
10.1007/JHEP01(2010)123
We calculate the next-to-leading order QCD corrections to quark-quark annihilation to a scalar resonant state (“diquark”) in a color representation of antitriplet or sextet at the Tevatron and LHC energies. At the LHC, we find the enhancement (K-factor) for the antitriplet diquark is typically about 1.31–1.35, and for the sextet diquark is about 1.22–1.32 for initial-state valence quarks. The full transverse-momentum spectrum for the diquarks is also calculated at the LHC by performing the soft gluon resummation to the leading logarithm and all orders in the strong coupling.
Scuola Internazionale Superiore di Studi Avanzati
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
http://creativecommons.org/licenses/by/4.0/
openAccess
NLO computations
Beyond standard model
Hadronic colliders
QCD
QCD corrections to scalar diquark production at hadron colliders
Article
Lewis, Ian
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/17742019-04-12T14:39:21Zcom_1808_109col_1808_110
Wilson, Graham Wallace
Desai, Satish
Cooke, Michael
Connolly, Brian
Borcherding, Fred
Blazey, Gerald
Bhattacharjee, Mrinmoy
Babukhadia, Levan
Angstadt, Robert
Anderson, John
Olsen, Jamieson
Evans, David
Grannis, Paul
Grünendahl, Stefan
Hu, Yuan
Jain, Vivek
Johnson, Marvin
Linn, Stephan
Lizarazo, Juan
Maravin, Yurii
Martin, Manuel
Mutaf, Yildirim
Nöding, Carsten
Ramirez-Gomez, Ricardo
Rapisarda, Stefano
Stevenson, Kyle
Tomoto, Makoto
Vachon, Brigitte
Wijnen, Thei
Wilcer, Neal
Xu, Qichun
Yip, Kin
2007-12-11T18:40:56Z
2007-12-11T18:40:56Z
2004-06
Wilson, G; Olsen, J; Anderson, J; Angstadt, R; Babukhadia, L; Bhattacharjee, M; Blazey, G; Borcherding, F; Connolly, B; Cooke, M; Desai, S. The DO Central Track Trigger. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, June 2004, 51(3, pt. 1): 345-350.
10.1109/TNS.2004.828703
http://hdl.handle.net/1808/1774
©2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
An overview of the system architecture and algorithms used for the DO Central Track Trigger (CTT) in the Run 2 of the Fermilab Tevatron Proton-Antiproton Collider is presented. This system uses information from the newly commissioned Central Fiber Tracker and Preshower Detectors to generate Level 1 trigger decisions. It also generates lists of seed tracks and preshower clusters that are sent to the Level 1 Moon Trigger, L2 Silicon Track Trigger, and Central and Forward Preshower Level 2 preprocessors. The system consists of modular boards which utilize field-programmable gate arrays (FPGAs) to implement trigger algorithms. The system delivers trigger decisions every 132 ns, based on input data flowing at a maximum sustained rate of 475 gigabits per second. The first results of trigger efficiency studies are presented.
en_US
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Nuclear Science & Technology
Triggering
Engineering, Electrical & Electronic
Data acquisition
Field programmable gate arrays
Parallel processing
Particle tracking
Scintillation detectors
The DO Central Track Trigger
Article
openAccess
oai:kuscholarworks.ku.edu:1808/177632019-04-12T14:53:16Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Carrasco-Lizarraga, M. A.
Chen, G.
Clutter, Justace Randall
McGivern, Carrie Lynne
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
2015-05-13T20:50:30Z
2015-05-13T20:50:30Z
2011-09-14
Abazov, V. M. et al. (2011). "Direct measurement of the mass difference between top and antitop quarks." Physical Review D, 84(5):52005. http://dx.doi.org/10.1103/PhysRevD.84.052005.
http://hdl.handle.net/1808/17763
10.1103/PhysRevD.84.052005
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.84.052005.
Americal Physical Society
Direct measurement of the mass difference between top and antitop quarks
Article
openAccess
Baringer, Philip S.
Bean, Alice
Carrasco-Lizarraga, M. A.
Chen, G.
Clutter, Justace Randall
McGivern, Carrie Lynne
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/175142019-04-12T14:51:33Zcom_1808_109col_1808_110
Sun, Guozhu
Zhou, Zhongyuan
Mao, Bo
Wen, Xueda
Wu, Peiheng
Han, Siyuan
2015-04-24T15:29:31Z
2015-04-24T15:29:31Z
2012-08-01
Guozhu Sun, Zhongyuan Zhou, Bo Mao, Xueda Wen, Peiheng Wu, and Siyuan Han. "Entanglement dynamics of a superconducting phase qubit coupled to a two-level system." Phys. Rev. B 86, 064502 – Published 1 August 2012. http://dx.doi.org/10.1103/PhysRevB.86.064502.
http://hdl.handle.net/1808/17514
10.1103/PhysRevB.86.064502
This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevB.86.064502.
We report the observation and quantitative characterization of driven and spontaneous oscillations of quantum entanglement, as measured by concurrence, in a bipartite system consisting of a macroscopic Josephson phase qubit coupled to a microscopic two-level system. The data clearly show the behavior of entanglement dynamics such as sudden death and revival, and the effect of decoherence and ac driving on entanglement.
American Physical Society
Entanglement dynamics of a superconducting phase qubit coupled to a two-level system
Article
openAccess
Zhou, Zhongyuan
Mao, Bo
Han, Siyuan
Physics and Astronomy
Chemistry
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/312782021-01-28T09:00:58Zcom_1808_109col_1808_110
Sirunyan, A. M.
Sanders, Stephen J.
CMS Collaboration
2021-01-27T20:16:38Z
2021-01-27T20:16:38Z
2019-03-14
A. M. Sirunyan et al., "Search for pair production of first-generation scalar leptoquarks at √s = 13 TeV", Phys. Rev. D 99, 052002, 14 March 2019, American Physical Society, https://doi.org/10.1103/PhysRevD.99.052002
http://hdl.handle.net/1808/31278
10.1103/PhysRevD.99.052002
This work is licensed under a Creative Commons Attribution 4.0 International License.
A search for the pair production of first-generation scalar leptoquarks is performed using proton-proton collision data recorded at 13 TeV center-of-mass energy with the CMS detector at the LHC. The data correspond to an integrated luminosity of 35.9 fb−1. The leptoquarks are assumed to decay promptly to a quark and either an electron or a neutrino, with branching fractions β and 1 − β, respectively. The search targets the decay final states comprising two electrons, or one electron and large missing transverse momentum, along with two quarks that are detected as hadronic jets. First-generation scalar leptoquarks with masses below 1435 (1270) GeV are excluded for β = 1.0 (0.5). These are the most stringent limits on the mass of first-generation scalar leptoquarks to date. The data are also interpreted to set exclusion limits in the context of an R-parity violating supersymmetric model, predicting promptly decaying top squarks with a similar dielectron final state.
American Physical Society
© 2019 CERN, for the CMS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Search for pair production of first-generation scalar leptoquarks at √s = 13 TeV
Article
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/152542019-04-12T14:47:19Zcom_1808_109col_1808_110
Ammar, Raymond G.
Baringer, Philip S.
Coppage, Don
Davis, Robin E. P.
Haas, P.
Kwak, Nowhan
Lam, H.
2014-10-09T15:53:30Z
2014-10-09T15:53:30Z
1991-02-01
Baringer, Philip S. et al. (1990). "Exclusive and inclusive semileptonic decays of B mesons to D mesons." Physical Review D, 1990(43):651. http://dx.doi.org/10.1103/PhysRevD.43.651
1550-7998
http://hdl.handle.net/1808/15254
10.1103/PhysRevD.43.651
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.43.651.
American Physical Society
Exclusive and inclusive semileptonic decays of B mesons to D mesons
Article
openAccess
Ammar, Raymond G.
Baringer, Philip S.
Coppage, Don
Davis, Robin E. P.
Haas P.
Kwak, Nowhan
Lam, H.
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/211822018-12-13T18:16:13Zcom_1808_109col_1808_110
Han, Tao
Lewis, Ian M.
Liu, Zhen
2016-07-27T15:39:53Z
2016-07-27T15:39:53Z
2010-12-27
Han, T., Lewis, I. & Liu, Z., Colored resonant signals at the LHC: largest rate and simplest topology J., High Energ. Phys. (2010) 2010: 85. doi:10.1007/JHEP12(2010)085
http://hdl.handle.net/1808/21182
10.1007/JHEP12(2010)085
We study the colored resonance production at the LHC in a most general approach. We classify the possible colored resonances based on group theory decomposition, and construct their effective interactions with light partons. The production cross section from annihilation of valence quarks or gluons may be on the order of 400–1000 pb at LHC energies for a mass of 1 TeV with nominal couplings, leading to the largest production rates for new physics at the TeV scale, and simplest event topology with dijet final states. We apply the new dijet data from the LHC experiments to put bounds on various possible colored resonant states. The current bounds range from 0.9 to 2.7 TeV. The formulation is readily applicable for future searches including other decay modes.
Scuola Internazionale Superiore di Studi Avanzati
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
http://creativecommons.org/licenses/by/4.0/
openAccess
Jets
Beyond standard model
Phenomenological models
Hadronic colliders
Colored resonant signals at the LHC: largest rate and simplest topology
Article
Lewis, Ian
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/269122018-11-16T19:31:16Zcom_1808_109col_1808_110
CMS Collaboration
2018-10-22T20:25:32Z
2018-10-22T20:25:32Z
2017-03
The CMS collaboration, Khachatryan, V., Sirunyan, A.M. et al. J. High Energ. Phys. (2017) 2017: 77. https://doi.org/10.1007/JHEP03(2017)077
http://hdl.handle.net/1808/26912
https://doi.org/10.1007/JHEP03(2017)077
A search for new particles has been conducted using events with two high transverse momentum (p T) τ leptons that decay hadronically, at least two high-p T jets, and missing transverse energy from the τ lepton decays. The analysis is performed using data from proton-proton collisions, collected by the CMS experiment in 2015 at s√=13 TeV, corresponding to an integrated luminosity of 2.1 fb−1. The results are interpreted in two physics models. The first model involves heavy right-handed neutrinos, Nℓ (ℓ = e, μ, τ), and right-handed charged bosons, WR, arising in a left-right symmetric extension of the standard model. Masses of the WR boson below 2.35 (1.63) TeV are excluded at 95% confidence level, assuming the N τ mass is 0.8 (0.2) times the mass of the WR boson and that only the N τ flavor contributes to the WR decay width. In the second model, pair production of third-generation scalar leptoquarks that decay into ττbb is considered. Third-generation scalar leptoquarks with masses below 740 GeV are excluded, assuming a 100% branching fraction for the leptoquark decay to a τ lepton and a bottom quark. This is the first search at hadron colliders for the third-generation Majorana neutrino, as well as the first search for third-generation leptoquarks in the final state with a pair of hadronically decaying τ leptons and jets.
Springer Verlag
© The Author(s) 2017
https://creativecommons.org/licenses/by/4.0/
openAccess
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Protonproton scattering
Search for heavy neutrinos or third-generation leptoquarks in final states with two hadronically decaying τ leptons and two jets in proton-proton collisions at s√=13 TeV
Article
Baringer, Philip, S.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/272002018-11-09T21:49:03Zcom_1808_109col_1808_110
ATLAS Collaboration
2018-11-05T20:23:47Z
2018-11-05T20:23:47Z
2017-09-28
Aaboud, M., Aad, G., Abbott, B., Abdallah, J., Abdinov, O., Abeloos, B., ... & Abreu, H. (2017). Search for new phenomena in dijet events using 37 fb− 1 of p p collision data collected at s= 13 TeV with the ATLAS detector. Physical Review D, 96(5), 052004.
http://hdl.handle.net/1808/27200
10.1103/PhysRevD.96.052004
Dijet events are studied in the proton-proton collision data set recorded at √s=13 TeV with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to integrated luminosities of 3.5 fb−1 and 33.5 fb−1 respectively. Invariant mass and angular distributions are compared to background predictions and no significant deviation is observed. For resonance searches, a new method for fitting the background component of the invariant mass distribution is employed. The data set is then used to set upper limits at a 95% confidence level on a range of new physics scenarios. Excited quarks with masses below 6.0 TeV are excluded, and limits are set on quantum black holes, heavy W′ bosons, W∗ bosons, and a range of masses and couplings in a Z′ dark matter mediator model. Model-independent limits on signals with a Gaussian shape are also set, using a new approach allowing factorization of physics and detector effects. From the angular distributions, a scale of new physics in contact interaction models is excluded for scenarios with either constructive or destructive interference. These results represent a substantial improvement over those obtained previously with lower integrated luminosity.
American Physical Society
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
https://creativecommons.org/licenses/by/4.0/
openAccess
Search for new phenomena in dijet events using 37 fb−1 of pp collision data collected at √s = 13 TeV with the ATLAS detector
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/174912019-04-12T14:58:10Zcom_1808_109col_1808_110
Rouse, R.
Han, Siyuan
Lukens, J. E.
2015-04-22T21:01:55Z
2015-04-22T21:01:55Z
1995-01-05
Rouse, R., Han, Siyuan., Lukens, J. E. "Flux amplification using stochastic superconducting quantum interference devices." Appl. Phys. Lett. 66, 108 (1995); http://dx.doi.org/10.1063/1.114161.
http://hdl.handle.net/1808/17491
10.1063/1.114161
This is the published version, also available here: http://dx.doi.org/10.1063/1.114161.
The flux change δ Φ through a bistable superconducting quantum interference device has been measured in the presence of thermally induced switching (with rate Γ) versus δ Φ x , the change in the applied flux. For small δ Φ x , δ Φ is proportional to δ Φ x with a measured flux gain g, depending on the temperature, barrier height, and frequency Ω, with a maximum of about 16. In agreement with theories of periodically driven stochastic bistable systems,g(Ω) is nearly frequency independent up to Γ and is proportional to Ω−1 for Ω≫Γ. For larger amplitude signals, harmonic generation has been measured in the adiabatic limit (Ω≪Γ) and found to be in good agreement with theory. Possible applications of this system for flux measurement are discussed.
American Institute of Physics
Adiabatic theorem
Quantum measurement theory
Superconducting quantum interference devices
Height measurements
Nonlinear optics
Flux amplification using stochastic superconducting quantum interference devices
Article
openAccess
Han, Siyuan
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/222422018-02-12T22:11:42Zcom_1808_109col_1808_110
CMS Collaboration
2016-12-15T21:02:18Z
2016-12-15T21:02:18Z
2015-11-12
CMS Collaboration. "Study of W boson production in pPb collisions at View the MathML source." Physic Letters B 750 (2015): 565-86.
http://hdl.handle.net/1808/22242
10.1016/j.physletb.2015.09.057
The first study of W boson production in pPb collisions is presented, for bosons decaying to a muon or electron, and a neutrino. The measurements are based on a data sample corresponding to an integrated luminosity of 34.6 nb−1 at a nucleon–nucleon centre-of-mass energy of View the MathML source, collected by the CMS experiment. The W boson differential cross sections, lepton charge asymmetry, and forward–backward asymmetries are measured for leptons of transverse momentum exceeding 25 GeV/c , and as a function of the lepton pseudorapidity in the |ηlab|<2.4 range. Deviations from the expectations based on currently available parton distribution functions are observed, showing the need for including W boson data in nuclear parton distribution global fits.
Elsevier
http://www.sciencedirect.com/science/article/pii/S0370269315007327
Open Access funded by SCOAP³ - Sponsoring Consortium for Open Access Publishing in Particle Physics
openAccess
CMS
W boson
pPB collisions
Study of W boson production in pPb collisions at View the MathML source
Article
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/153802019-04-12T14:48:11Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Coppage, Don
Gardner, J.
Hensel, Carsten
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
2014-10-23T19:47:28Z
2014-10-23T19:47:28Z
2006-11-13
V. M. Abazov et al. (D0Collaboration). (2006). "Measurement of the CP-violation parameter of B0 mixing and decay with pp-bar→μμX data." Physical Review D, 74(9):092001. http://dx.doi.org/10.1103/PhysRevD.74.092001
1550-7998
http://hdl.handle.net/1808/15380
10.1103/PhysRevD.74.092001
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.74.092001.
American Physical Society
Measurement of the CP-violation parameter of B0 mixing and decay with pp-bar→μμX data
Article
openAccess
Baringer, Philip S.
Bean, Alice
Coppage, Don
Gardner, J.
Hensel, Carsten
Moulik, Tania
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/178922018-07-10T16:30:04Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
D0 Collaboration
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Alexeev, G. D.
Alkhazov, G.
2015-05-28T20:06:52Z
2015-05-28T20:06:52Z
2013-04-25
Abazov, V.M. et al. (2013). "Measurement of the combined rapidity and pT dependence of dijet azimuthal decorrelations in pp-bar collisions at sqrt(s)=1.96TeV." Physics Letters B, 721(4-5):212-219. http://www.dx.doi.org/10.1016/j.physletb.2013.03.029.
http://hdl.handle.net/1808/17892
10.1016/j.physletb.2013.03.029
Elsevier: SCOAP1
This article is published by Elsevier under a Creative Commons Attribution License, and is also available electronically from http://www.sciencedirect.com/science/article/pii/S0370269313002542#.
http://creativecommons.org/licenses/by/3.0/
openAccess
Measurement of the combined rapidity and pT dependence of dijet azimuthal decorrelations in pp-bar collisions at sqrt(s)=1.96TeV
Article
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/13762018-03-05T20:45:19Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Ammar, Raymond G.
Besson, David Zeke
Zhao, X.
2007-04-13
2007-04-13
2002-12
Eckhart, E, Gan, KK, et al. Observation of B -> K-S(0)pi(+)pi(-) and evidence for B -> K-*+/-pi(-/+). PHYSICAL REVIEW LETTERS. December 2002. 89(25)
http://hdl.handle.net/1808/1376
We report on a search for charmless hadronic B decays to the three-body final states K(S)(0)h(+)pi(-), K(+)h(-)pi(0), K(S)(0)h(+)pi(0) (h(+/-) denotes a charged pion or kaon), and their charge conjugates, using 13.5 fb(-1) of integrated luminosity produced near roots=10.6 GeV, and collected with the CLEO detector. We observe the decay B-->K(0)pi(+)pi(-) with a branching fraction (50(-9)(+10)(stat.)+/-7(syst.))x10(-6) and the decay B-->K*+(892)pi(-) with a branching fraction (16(-5)(+6)(stat.)+/-2(syst.))x10(-6).
en_US
AMERICAN PHYSICAL SOC
http://publish.aps.org/
Observation of B -> K-S(0)pi(+)pi(-) and evidence for B -> K-*+/-pi(-/+)
Article
openAccess
oai:kuscholarworks.ku.edu:1808/192802019-04-12T14:51:45Zcom_1808_109col_1808_110
Sell, Paul H.
Tremonti, Christy
Hickox, Ryan C.
Diamond-Stanic, A. M.
Moustakas, J.
Coil, Alison L.
Williams, A.
Rudnick, Gregory H.
Robaina, A.
Geach, James E.
Heinz, S.
Wilcots, E. M.
2015-12-18T16:07:07Z
2015-12-18T16:07:07Z
2014-07-11
Sell, P. H., C. A. Tremonti, R. C. Hickox, A. M. Diamond-Stanic, J. Moustakas, A. Coil, A. Williams, G. Rudnick, A. Robaina, J. E. Geach, S. Heinz, and E. M. Wilcots. "Massive Compact Galaxies with High-velocity Outflows: Morphological Analysis and Constraints on AGN Activity." Monthly Notices of the Royal Astronomical Society 441.4 (2014): 3417-443. http://dx.doi.org/10.1093/mnras/stu636
http://hdl.handle.net/1808/19280
10.1093/mnras/stu636
https://orcid.org/0000-0001-5851-1856
This is the published version. Copyright © 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society
We investigate the process of rapid star formation quenching in a sample of 12 massive galaxies at intermediate redshift (z ∼ 0.6) that host high-velocity ionized gas outflows (v > 1000 km s−1). We conclude that these fast outflows are most likely driven by feedback from star formation rather than active galactic nuclei (AGNs). We use multiwavelength survey and targeted observations of the galaxies to assess their star formation, AGN activity, and morphology. Common attributes include diffuse tidal features indicative of recent mergers accompanied by bright, unresolved cores with effective radii less than a few hundred parsecs. The galaxies are extraordinarily compact for their stellar mass, even when compared with galaxies at z ∼ 2–3. For 9/12 galaxies, we rule out an AGN contribution to the nuclear light and hypothesize that the unresolved core comes from a compact central starburst triggered by the dissipative collapse of very gas-rich progenitor merging discs. We find evidence of AGN activity in half the sample but we argue that it accounts for only a small fraction (≲10 per cent) of the total bolometric luminosity. We find no correlation between AGN activity and outflow velocity and we conclude that the fast outflows in our galaxies are not powered by ongoing AGN activity, but rather by recent, extremely compact starbursts.
Oxford University Press
Galaxies
Active galaxies
Evolution galaxies
Interactions galaxies
Starburst
Massive compact galaxies with high-velocity outflows: morphological analysis and constraints on AGN activity
Article
openAccess
Rudnick, Gregory H.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/157172019-04-12T14:48:55Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Kenny, R. P., III
Murray, Michael J.
Sanders, Stephen J.
Stringer, Robert W.
Tinti, Gemma
Wood, Jeffrey Scott
Chatrchyan, S.
Khachatryan, V.
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Aguilo, E.
Bergauer, T.
Dragicevic, M.
Erö, J.
2014-11-12T17:42:33Z
2014-11-12T17:42:33Z
2013-02-20
S. Chatrchyan et al. (CMS Collaboration). (2013). "Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at s√=7 TeV." Physical Review Letters, 110(8):081801. http://dx.doi.org/10.1103/PhysRevLett.110.081801.
0031-9007
http://hdl.handle.net/1808/15717
10.1103/PhysRevLett.110.081801
This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.110.081801.
Results are presented from a search for the pair production of third-generation scalar and vector leptoquarks, as well as for top squarks in R-parity-violating supersymmetric models. In either scenario, the new, heavy particle decays into a τ lepton and a b quark. The search is based on a data sample of pp collisions at s√=7 TeV, which is collected by the CMS detector at the LHC and corresponds to an integrated luminosity of 4.8 fb(−1). The number of observed events is found to be in agreement with the standard model prediction, and exclusion limits on mass parameters are obtained at the 95% confidence level. Vector leptoquarks with masses below 760 GeV are excluded and, if the branching fraction of the scalar leptoquark decay to a τ lepton and a b quark is assumed to be unity, third-generation scalar leptoquarks with masses below 525 GeV are ruled out. Top squarks with masses below 453 GeV are excluded for a typical benchmark scenario, and limits on the coupling between the top squark, τ lepton, and b quark, λ′333 are obtained. These results are the most stringent for these scenarios to date.
American Physical Society
Search for Pair Production of Third-Generation Leptoquarks and Top Squarks in pp Collisions at s√=7 TeV
Article
openAccess
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Kenny, R. P. III
Murray, Michael J.
Noonan, Danny
Sanders, Stephen J.
Stringer, Robert W.
Wood, Jeffrey Scott
Physics and Astronomy
fullparticipation
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/251872017-12-18T20:42:10Zcom_1808_109col_1808_110
CMS Collaboration
2017-10-24T17:32:13Z
2017-10-24T17:32:13Z
2016-02-22
The CMS collaboration, Khachatryan, V., Sirunyan, A.M. et al. J. High Energ. Phys. (2016) 2016: 145. https://doi.org/10.1007/JHEP02(2016)145
http://hdl.handle.net/1808/25187
10.1007/JHEP02(2016)145
A search for a massive resonance decaying into a standard-model-like Higgs boson (H) and a W or Z boson is reported. The analysis is performed on a data sample corresponding to an integrated luminosity of 19.7 fb−1, collected in proton-proton collisions at a centre-of-mass energy of 8 TeV with the CMS detector at the LHC. Signal events, in which the decay products of Higgs, W, or Z bosons at high Lorentz boost are contained within single reconstructed jets, are identified using jet substructure techniques, including the tagging of b hadrons. This is the first search for heavy resonances decaying into HW or HZ resulting in an all-jet final state, as well as the first application of jet substructure techniques to identify H → WW* → 4q decays at high Lorentz boost. No significant signal is observed and limits are set at 95% confidence level on the production cross sections of W′ and Z′ in a model with mass-degenerate charged and neutral spin-1 resonances. Resonance masses are excluded for W′ in the interval [1.0, 1.6] TeV, for Z′ in the intervals [1.0, 1.1] and [1.3, 1.5] TeV, and for mass-degenerate W′ and Z′ in the interval [1.0, 1.7] TeV.
Springer Verlag
This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
http://creativecommons.org/licenses/by/4.0/
openAccess
Hadron-Hadron scattering
Beyond Standard Model
Particle and resonance production
Higgs physics
Search for a massive resonance decaying into a Higgs boson and a W or Z boson in hadronic final states in proton-proton collisions at s√=8 TeV
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/313012021-01-30T09:01:31Zcom_1808_109col_1808_110
Sirunyan, A. M.
Sanders, Stephen J.
CMS Collaboration
2021-01-29T19:40:25Z
2021-01-29T19:40:25Z
2019-09-23
A. M. Sirunyan et al., "Search for a Light Charged Higgs Boson Decaying to a W Boson and a CP-Odd Higgs Boson in Final States with eμμ or μμμ in Proton-Proton Collisions at √s = 13 TeV", Phys. Rev. Lett. 123, 131802, 23 September 2019, American Physical Society, https://doi.org/10.1103/PhysRevLett.123.131802
http://hdl.handle.net/1808/31301
10.1103/PhysRevLett.123.131802
This work is licensed under a Creative Commons Attribution 4.0 International License.
A search for a light charged Higgs boson (H+) decaying to a W boson and a CP-odd Higgs boson (A) in final states with eμμ or μμμ is performed using data from pp collisions at √s=13 TeV, recorded by the CMS detector at the LHC and corresponding to an integrated luminosity of 35.9 fb−1. In this search, it is assumed that the H+ boson is produced in decays of top quarks, and the A boson decays to two oppositely charged muons. The presence of signals for H+ boson masses between 100 and 160 GeV and A boson masses between 15 and 75 GeV is investigated. No evidence for the production of the H+ boson is found. Upper limits at 95% confidence level are obtained on the combined branching fraction for the decay chain, t → bH^+ → bW^+ A → bW^+ μ^+ ^μ−, of 1.9×10^−6 to 8.6×10^−6, depending on the masses of the H+ and A bosons. These are the first limits for these decay modes of the H+ and A bosons.
American Physical Society
© 2019 CERN, for the CMS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Search for a Light Charged Higgs Boson Decaying to a W Boson and a CP-Odd Higgs Boson in Final States with eμμ or μμμ in Proton-Proton Collisions at √s = 13 TeV
Article
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/269742018-10-24T08:01:15Zcom_1808_109col_1808_110
CMS Collaboration
2018-10-23T19:53:32Z
2018-10-23T19:53:32Z
2017-08-25
Sirunyan, A. M., Tumasyan, A., Adam, W., Ambrogi, F., Asilar, E., Bergauer, T., ... & Flechl, M. (2017). Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV. Physical Review D, 96(3), 032003.
http://hdl.handle.net/1808/26974
10.1103/PhysRevD.96.032003
A search for supersymmetry is presented based on multijet events with large missing transverse momentum produced in proton-proton collisions at a center-of-mass energy of √s=13 TeV. The data, corresponding to an integrated luminosity of 35.9 fb−1, were collected with the CMS detector at the CERN LHC in 2016. The analysis utilizes four-dimensional exclusive search regions defined in terms of the number of jets, the number of tagged bottom quark jets, the scalar sum of jet transverse momenta, and the magnitude of the vector sum of jet transverse momenta. No evidence for a significant excess of events is observed relative to the expectation from the standard model. Limits on the cross sections for the pair production of gluinos and squarks are derived in the context of simplified models. Assuming the lightest supersymmetric particle to be a weakly interacting neutralino, 95% confidence level lower limits on the gluino mass as large as 1800 to 1960 GeV are derived, and on the squark mass as large as 960 to 1390 GeV, depending on the production and decay scenario.
American Physical Society
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
https://creativecommons.org/licenses/by/4.0/
openAccess
Search for supersymmetry in multijet events with missing transverse momentum in proton-proton collisions at 13 TeV
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/178382018-07-13T16:51:12Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
McGivern, Carrie Lynne
Sekaric, Jadranka
Wilson, Graham Wallace
D0 Collaboration
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
2015-05-26T19:03:08Z
2015-05-26T19:03:08Z
2011-11-11
Abazov, V.M. et al. (2011). "High mass exclusive diffractive dijet production in ppbar collisions at √s = 1.96 TeV." Physics Letters B, 705(3):193-199. http://www.dx.doi.org/10.1016/j.physletb.2011.10.013.
http://hdl.handle.net/1808/17838
10.1016/j.physletb.2011.10.013
We present evidence for diffractive exclusive dijet production with an invariant dijet mass greater than 100 GeV in data collected with the D0 experiment at the Fermilab Tevatron Collider. A discriminant based on calorimeter information is used to measure a significant number of events with little energy (typically less than 10 GeV) outside the dijet system, consistent with the diffractive exclusive dijet production topology. The probability for these events to be explained by other dijet production processes is 2×^(10−6), corresponding to a 4.7 standard deviation significance.
Elsevier: SCOAP3
This article is published by Elsevier under a Creative Commons Attribution License, and is available electronically from http://www.sciencedirect.com/science/article/pii/S0370269311012457.
http://creativecommons.org/licenses/by/4.0/
openAccess
High mass exclusive diffractive dijet production in ppbar collisions at √s = 1.96 TeV
Article
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
McGivern, Carrie Lynne
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/14452018-03-06T19:20:57Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Besson, David Zeke
2007-04-14T09:52:16Z
2007-04-14T09:52:16Z
2005-12
Artuso, M, Boulahouache, C, et al. Evidence for B-s((*)) (B)over-bar(s)((*)) - Production at the Upsilon (5S) resonance. PHYSICAL REVIEW LETTERS. December 2005. 95(26)
http://hdl.handle.net/1808/1445
We use data collected by the CLEO III detector at the Cornell Electron Storage Ring to measure the inclusive yields of D-s mesons as B(Upsilon(5S)-> DsX)=(44.7 +/- 4.2 +/- 9.9)% and B(Upsilon(4S)-> DsX)=(18.1 +/- 0.5 +/- 2.8)%. From these measurements, we make a model dependent estimate of the ratio of B-s((*)) (B) over bar ((*))(s) to the total b (b) over bar quark pair production of (16.0 +/- 2.6 +/- 5.8)% at the Upsilon(5S) energy.
en_US
AMERICAN PHYSICAL SOC
http://publish.aps.org/
Evidence for B-s((*)) (B)over-bar(s)((*)) - Production at the Upsilon (5S) resonance
Article
openAccess
oai:kuscholarworks.ku.edu:1808/156872019-04-12T14:48:40Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
Askew, A.
Atkins, S.
2014-11-11T17:01:43Z
2014-11-11T17:01:43Z
2013-09-17
V. M. Abazov et al. (D0 Collaboration). (2013). "Search for a Higgs boson in diphoton final states with the D0 detector in 9.6 fb(−1) of pp-bar collisions at s√=1.96 TeV." Physical Review D, 88(5):052007. http://www.dx.doi.org/10.1103/PhysRevD.88.052007.
0556-2821
http://hdl.handle.net/1808/15687
10.1103/PhysRevD.88.052007
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.88.052007.
We present a search for a Higgs boson decaying into a pair of photons based on 9.6 fb(−1) of pp-bar collisions at s√=1.96 TeV collected with the D0 detector at the Fermilab Tevatron Collider. The search employs multivariate techniques to discriminate signal from the nonresonant background and is separately optimized for a standard model and a fermiophobic Higgs boson. No significant excess of data above the background prediction is observed and upper limits on the product of the cross section and branching fraction are derived at the 95% confidence level as a function of Higgs boson mass. For a standard model Higgs boson with mass of 125 GeV, the observed (expected) upper limits are a factor of 12.8 (8.7) above the standard model prediction. The existence of a fermiophobic Higgs boson with mass in the 100–113 GeV range is excluded at the 95% confidence level.
American Physical Society
Search for a Higgs boson in diphoton final states with the D0 detector in 9.6 fb(−1) of pp-bar collisions at s√=1.96 TeV
Article
openAccess
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Chen, G.
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
fullparticipation
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/222782018-02-12T22:27:43Zcom_1808_109col_1808_110
CDF Collaboration
Aaltonen, T.
Amerio, S.
Amidel, D.
Anastassov, A.
Annovi, A.
D0 Collaboration
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
2016-12-21T17:26:40Z
2016-12-21T17:26:40Z
2015-04-15
Aaltonen, T., Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., … Alton, A. (2015). Tevatron Constraints on Models of the Higgs Boson with Exotic Spin and Parity Using Decays to Bottom-Antibottom Quark Pairs. Physical Review Letters, 114(15). doi:10.1103/physrevlett.114.151802
http://hdl.handle.net/1808/22278
10.1103/PhysRevLett.114.151802
Combined constraints from the CDF and D0 Collaborations on models of the Higgs boson with exotic spin J and parity P are presented and compared with results obtained assuming the standard model value JP=0+. Both collaborations analyzed approximately 10 fb−1 of proton-antiproton collisions with a center-of-mass energy of 1.96 TeV collected at the Fermilab Tevatron. Two models predicting exotic Higgs bosons with JP=0− and JP=2+ are tested. The kinematic properties of exotic Higgs boson production in association with a vector boson differ from those predicted for the standard model Higgs boson. Upper limits at the 95% credibility level on the production rates of the exotic Higgs bosons, expressed as fractions of the standard model Higgs boson production rate, are set at 0.36 for both the JP=0− hypothesis and the JP=2+ hypothesis. If the production rate times the branching ratio to a bottom-antibottom pair is the same as that predicted for the standard model Higgs boson, then the exotic bosons are excluded with significances of 5.0 standard deviations and 4.9 standard deviations for the JP=0− and JP=2+ hypotheses, respectively.
American Physical Society (APS)
This article is licensed under a Creative Commons Attributions 3.0 Unported (CC BY 3.0) license.
http://creativecommons.org/licenses/by/3.0/
openAccess
Tevatron Constraints on Models of the Higgs Boson with Exotic Spin and Parity Using Decays to Bottom-Antibottom Quark Pairs
Article
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/13752018-03-05T20:44:05Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Ammar, Raymond G.
Besson, David Zeke
Zhao, X.
2007-04-12T23:59:54Z
2007-04-12T23:59:54Z
2002-12
Anderson, S, Frolov, VV, et al. Measurements of inclusive B ->psi production. PHYSICAL REVIEW LETTERS. December 2002. 89(28)
http://hdl.handle.net/1808/1375
Using the combined CLEO II and CLEO II.V data sets of 9.1 fb(-1) at the Y(4S), we measure properties of psi mesons produced directly from decays of the B meson, where "B" denotes an admixture of B+, B-, B-0, and (B) over bar (0), and "psi" denotes either J/psi(1S) or psi(2S). We report first measurements of psi polarization in B-->psi(direct)X: alpha(psi(1S))=-0.30(-0.06)(+0.07)+/-0.04 and alpha(psi(2S))=-0.45(-0.19)(+0.22)+/-0.04. We also report improved measurements of the momentum distributions of psi produced directly from B decays, correcting for measurement smearing. Finally, we report measurements of the inclusive branching fraction for B-->psiX and B-->chi(c1)X.
en_US
AMERICAN PHYSICAL SOC
http://publish.aps.org/
Measurements of inclusive B ->psi production
Article
openAccess
oai:kuscholarworks.ku.edu:1808/17812019-04-12T14:32:01Zcom_1808_109col_1808_110
Wilson, Graham Wallace
Johnson, Marvin
Jain, Vivek
Hu, Yuan
Hensel, Carsten
Grünendahl, Stefan
Grannis, Paul
Evans, David
Desai, Satish
Cooke, Michael
Connolly, Brian
Maravin, Yurii
Anderson, John
Angstadt, Robert
Babukhadia, Levan
Bhattacharjee, Mrinmoy
Blazey, Gerald
Borcherding, Fred
Hensel, Carsten
Linn, Stephan
Lizarazo, Juan
Martin, Manuel
Mutaf, Yildirim
Nöding, Carsten
Olsen, Jamieson
Ramirez-Gomez, Ricardo
Rapisarda, Stefano
Stevenson, Kyle
Tomoto, Makoto
Vachon, Brigitte
Wijnen, Thei
Wilcer, Neal
Xu, Qichun
Yip, Kin
2007-12-13T13:54:45Z
2007-12-13T13:54:45Z
2004-08
Wilson, G; Maravin, Y; Anderson, J; Angstadt, R; Babukhadia, L; Bhattacharjee, M; Blazey, G; Borcherding, F; Connolly, B; Cooke, M; Desai, S; Evans, D; Grannis, P; Grunendahl, S; Hensel, C; Hu, Y; Jain, V; Johnson, M. First results from the central tracking trigger of the DO experiment. IEEE TRANSACTIONS ON NUCLEAR SCIENCE. Aug 2004. 51(4, Part 1): 1848-1851.
http://hdl.handle.net/1808/1781
10.1109/TNS.2004.832623
©2004 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
An overview of the DO Central Track Trigger (CTT) for the Tevatron Run 2 program is presented. This newly commissioned system uses information from the DO Central Fiber Tracker and Preshower Detectors to generate trigger information for the first level of the three-tiered DO Trigger. The system delivers tracking detector trigger decisions every 132 ns, based on input data flowing at a rate of 475 Gbit per second. Initial results indicate excellent performance of the CTT. First studies of efficiency and trigger performance of the CTT are presented.
en_US
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
Nuclear Science & Technology
Triggering
Engineering, Electrical & Electronic
Data acquisition
Field programmable gate arrays
Parallel scintillation detectors
First results from the central tracking trigger of the DO experiment
Article
openAccess
oai:kuscholarworks.ku.edu:1808/211832018-12-13T18:14:40Zcom_1808_109col_1808_110
Han, Tao
Lewis, Ian M.
Sher, Marc
2016-07-27T15:43:57Z
2016-07-27T15:43:57Z
2010-03-10
Han, T., Lewis, I. & Sher, M., μτ production at hadron colliders, J. High Energ. Phys. (2010) 2010: 90. doi:10.1007/JHEP03(2010)090
http://hdl.handle.net/1808/21183
10.1007/JHEP03(2010)090
Motivated by large νμ−ντ flavor mixing, we consider μτ production at hadron colliders via dimension-6 effective operators, which can be attributed to new physics in the flavor sector at a higher scale Λ. Current bounds on many of these operators from low energy experiments are very weak or nonexistent, and they may lead to clean μ+τ− and μ−τ+ signals at hadron colliders. At the Tevatron with 8 fb−1, one can exceed current bounds for most operators, with most 2σ sensitivities being in the 6 − 24 TeV range. We find that at the LHC with 1 fb−1 (100 fb−1) integrated luminosity, one can reach a 2σ sensitivity for Λ ∼ 3−10 TeV (Λ ∼ 6−21 TeV), depending on the Lorentz structure of the operator. For some operators, an improvement of several orders of magnitude in sensitivity can be obtained with only a few tens of pb−1 at the LHC.
Scuola Internazionale Superiore di Studi Avanzati
This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
http://creativecommons.org/licenses/by/4.0/
openAccess
Beyond standard model
Hadronic colliders
μτ production at hadron colliders
Article
Lewis, Ian
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/14702019-04-12T14:35:59Zcom_1808_109col_1808_110
Ammar, Raymond G.
Ball, S.
Baringer, Philip S.
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kelly, M.
Kwak, Nowhan
Lam, H.
2007-04-14T10:01:36Z
2007-04-14T10:01:36Z
1993-12
BATTLE, M, ERNST, J, et al. Observation of B(0) decay to 2 charmless mesons. PHYSICAL REVIEW LETTERS. December 1993. 71(240 : 3922-3926
http://hdl.handle.net/1808/1470
10.1103/PhysRevLett.71.3922
We report results from a search for the decays B0 --> pi+pi-, B0 --> K+pi-, and B0 --> K+K-. We find 90% confidence level upper limits on the branching fractions, B(pipi) < 2.9 x 10(-5) , B(Kpi) < 2.6 x 10(-5), and B(KK) < 0.7 x 10(-5). While there is no statistically significant signal in the individual modes, the sum of B(pipi) and B(Kpi) exceeds zero with a significance of more than 4 standard deviations, indicating that we have observed charmless hadronic B decays.
en_US
AMERICAN PHYSICAL SOC
Observation of B(0) decay to 2 charmless mesons
Article
openAccess
oai:kuscholarworks.ku.edu:1808/179162019-04-12T14:51:42Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Aaltonen, T.
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Agnew, J. P.
Alexeev, G. D.
Alkhazov, G.
2015-06-01T15:48:41Z
2015-06-01T15:48:41Z
2014-04-01
Aaltonen, T. et al. (2014). "Combination of measurements of the top-quark pair production cross section from the Tevatron Collider." Physical Review D, 89(7):72001. http://www.dx.doi.org/10.1103/PhysRevD.89.072001.
http://hdl.handle.net/1808/17916
10.1103/PhysRevD.89.072001
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.89.072001.
American Physical Society
Combination of measurements of the top-quark pair production cross section from the Tevatron Collider
Article
openAccess
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/267862018-11-29T20:46:26Zcom_1808_109col_1808_110
ATLAS Collaboration
2018-10-04T18:44:53Z
2018-10-04T18:44:53Z
2017-12
Aaboud, M., Aad, G., Abbott, B. et al. Eur. Phys. J. C (2017) 77: 872. https://doi.org/10.1140/epjc/s10052-017-5442-0
http://hdl.handle.net/1808/26786
10.1140/epjc/s10052-017-5442-0
Measurements of transverse energy–energy correlations and their associated asymmetries in multi-jet events using the ATLAS detector at the LHC are presented. The data used correspond to s√=8 TeV proton–proton collisions with an integrated luminosity of 20.2 fb−1. The results are presented in bins of the scalar sum of the transverse momenta of the two leading jets, unfolded to the particle level and compared to the predictions from Monte Carlo simulations. A comparison with next-to-leading-order perturbative QCD is also performed, showing excellent agreement within the uncertainties. From this comparison, the value of the strong coupling constant is extracted for different energy regimes, thus testing the running of αs(μ) predicted in QCD up to scales over 1 TeV. A global fit to the transverse energy–energy correlation distributions yields αs(mZ)=0.1162±0.0011(exp.) +0.0084−0.0070(theo.) , while a global fit to the asymmetry distributions yields a value of αs(mZ)=0.1196±0.0013(exp.) +0.0075−0.0045(theo.) .
SpringerOpen
© CERN for the benefit of the ATLAS collaboration 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
http://creativecommons.org/licenses/by/4.0/
openAccess
Determination of the strong coupling constant αs from transverse energy–energy correlations in multijet events at s√=8 TeV using the ATLAS detector
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/193142019-04-12T14:53:18Zcom_1808_109col_1808_110
CMS Collaboration
Bean, Alice
2015-12-21T19:10:19Z
2015-12-21T19:10:19Z
2014-02
The CMS collaboration. "Measurement of the tt¯ production cross section in the dilepton channel in pp collisions at s√ = 8 TeV." Journal of High Energy Physics. February, 2014: v5 n2.http://dx.doi.org/10.1007/JHEP02(2014)024
http://hdl.handle.net/1808/19314
10.1007/JHEP02(2014)024
This is the published version.
The top-antitop quark (tt¯) production cross section is measured in proton-proton collisions at s√ = 8 TeV with the CMS experiment at the LHC, using a data sample corresponding to an integrated luminosity of 5.3 fb−1. The measurement is performed by analysing events with a pair of electrons or muons, or one electron and one muon, and at least two jets, one of which is identified as originating from hadronisation of a bottom quark. The measured cross section is 239 ± 2 (stat.) ± 11 (syst.) ± 6 (lum.) pb, for an assumed top-quark mass of 172.5 GeV, in agreement with the prediction of the standard model.
Springer Verlag
Hadron-Hadron Scattering
Top physics
Measurement of the tt¯ production cross section in the dilepton channel in pp collisions at s√ = 8 TeV
Article
openAccess
Bean, Alice
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/271492018-11-09T21:35:13Zcom_1808_109col_1808_110
ATLAS Collaboration
2018-11-01T20:18:52Z
2018-11-01T20:18:52Z
2017-08-04
ATLAS collaboration. (2017). Search for the Dimuon Decay of the Higgs Boson in $ pp $ Collisions at $\sqrt {s} $= 13 TeV with the ATLAS Detector. arXiv preprint arXiv:1705.04582.
http://hdl.handle.net/1808/27149
10.1103/PhysRevLett.119.051802
A search for the dimuon decay of the Higgs boson was performed using data corresponding to an integrated luminosity of 36.1 fb−1 collected with the ATLAS detector in pp collisions at √s=13 TeV at the Large Hadron Collider. No significant excess is observed above the expected background. The observed (expected) upper limit on the cross section times branching ratio is 3.0 (3.1) times the Standard Model prediction at the 95% confidence level for a Higgs boson mass of 125 GeV. When combined with the pp collision data at √s=7 TeV and √s=8 TeV, the observed (expected) upper limit is 2.8 (2.9) times the Standard Model prediction.
American Physical Society
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI
https://creativecommons.org/licenses/by/4.0/
openAccess
Search for the Dimuon Decay of the Higgs Boson in pp Collisions at √s = 13 TeV with the ATLAS Detector
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/254542018-04-02T20:15:58Zcom_1808_109col_1808_110
Aaboud, M.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
AbouZeid, O. S.
Royon, Christophe
2017-11-22T18:04:00Z
2017-11-22T18:04:00Z
2016-12-05
Aaboud, M., Aad, G., Abbott, B. et al. Eur. Phys. J. C (2016) 76: 670. https://doi.org/10.1140/epjc/s10052-016-4521-y
http://hdl.handle.net/1808/25454
10.1140/epjc/s10052-016-4521-y
Funded by SCOAP3
The dijet production cross section for jets containing a b-hadron (b-jets) has been measured in proton–proton collisions with a centre-of-mass energy of √s = 7 TeV, using the ATLAS detector at the LHC. The data used correspond to an integrated luminosity of 4.2 fb−1. The cross section is measured for events with two identified b-jets with a transverse momentum pT > 20 GeV and a minimum separation in the η–φ plane of R = 0.4. At least one of the jets in the event is required to have pT > 270 GeV. The cross section is measured differentially as a function of dijet invariant mass, dijet transverse momentum, boost of the dijet system, and the rapidity difference, azimuthal angle and angular distance between the b-jets. The results are compared to different predictions of leading order and next-to-leading order perturbative quantum chromodynamics matrix elements supplemented with models for parton-showers and hadronization.
Springer Verlag
© CERN for the benefit of the ATLAS collaboration 2016. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
http://creativecommons.org/licenses/by/4.0/
openAccess
Measurement of the bb dijet cross section in pp collisions at √s = 7 TeV with the ATLAS detector
Article
Royon, Christophe
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/251172017-12-18T20:19:13Zcom_1808_109col_1808_110
CMS Collaboration
2017-10-11T19:17:13Z
2017-10-11T19:17:13Z
2016-05-31
CMS Collaboration. (2016). Search for neutral resonances decaying into a Z boson and a pair of b jets or τ leptons.
http://hdl.handle.net/1808/25117
10.1016/j.physletb.2016.05.087
A search is performed for a new resonance decaying into a lighter resonance and a Z boson. Two channels are studied, targeting the decay of the lighter resonance into either a pair of oppositely charged τ leptons or a pair. The Z boson is identified via its decays to electrons or muons. The search exploits data collected by the CMS experiment at a centre-of-mass energy of 8 TeV, corresponding to an integrated luminosity of 19.8 fb−1. No significant deviations are observed from the standard model expectation and limits are set on production cross sections and parameters of two-Higgs-doublet models.
Elsevier
© 2016 The Author. Published by Elsevier B.V. This is an open access article under the CC BY license.
http://creativecommons.org/licenses/by/4.0/
openAccess
CMS
Physics
Higgs
2HDM
BSM
b-Tagging
Tau
Lepton
Search for neutral resonances decaying into a Z boson and a pair of b jets or τleptons
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/311662021-01-16T09:01:02Zcom_1808_109col_1808_110
Sirunyan, A. M.
Sanders, Stephen J.
The CMS collaboration
2021-01-15T21:23:21Z
2021-01-15T21:23:21Z
2019-05-31
The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Search for a low-mass τ−τ+ resonance in association with a bottom quark in proton-proton collisions at √𝑠 = 13 TeV. J. High Energ. Phys. 2019, 210 (2019). https://doi.org/10.1007/JHEP05(2019)210
http://hdl.handle.net/1808/31166
10.1007/JHEP05(2019)210
This work is licensed under a Creative Commons Attribution 4.0 International License.
A general search is presented for a low-mass τ−τ+ resonance produced in association with a bottom quark. The search is based on proton-proton collision data at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 35.9 fb−1. The data are consistent with the standard model expectation. Upper limits at 95% confidence level on the cross section times branching fraction are determined for two signal models: a light pseudoscalar Higgs boson decaying to a pair of τ leptons produced in association with bottom quarks, and a low-mass boson X decaying to a τ-lepton pair that is produced in the decay of a bottom-like quark B such that B → bX. Masses between 25 and 70 GeV are probed for the light pseudoscalar boson with upper limits ranging from 250 to 44 pb. Upper limits from 20 to 0.3 pb are set on B masses between 170 and 450 GeV for X boson masses between 20 and 70 GeV.
Springer Verlag
Copyright CERN, for the benefit of the CMS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Hadron-Hadron scattering (experiments)
Higgs physics
Tau Physics
Search for a low-mass τ−τ+ resonance in association with a bottom quark in proton-proton collisions at √𝑠 = 13 TeV
Article
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/254562017-11-23T09:02:28Zcom_1808_109col_1808_110
ATLAS Collaboration
Aaboud, M.
Aad, G.
Abbott, B.
Abdallah, J.
Abdinov, O.
Abeloos, B.
Aben, R.
AbouZeid, O. S.
Royon, Christophe
2017-11-22T18:29:49Z
2017-11-22T18:29:49Z
2016-11-11
Aaboud, M., Aad, G., Abbott, B. et al. Phys. Rev. D (2016) 94: http://doi.org/10.1103/PhysRevD.94.092003
http://hdl.handle.net/1808/25456
10.1103/PhysRevD.94.092003
Measurements of normalized differential cross sections of top quark pair (t¯t) production are presented as a function of the mass, the transverse momentum and the rapidity of the t¯t system in proton-proton collisions at center-of-mass energies of √s=7 and 8 TeV. The data set corresponds to an integrated luminosity of 4.6 fb−1 at 7 TeV and 20.2 fb−1 at 8 TeV, recorded with the ATLAS detector at the Large Hadron Collider. Events with top quark pair signatures are selected in the dilepton final state, requiring exactly two charged leptons and at least two jets with at least one of the jets identified as likely to contain a b hadron. The measured distributions are corrected for detector effects and selection efficiency to cross sections at the parton level. The differential cross sections are compared with different Monte Carlo generators and theoretical calculations of t¯t production. The results are consistent with the majority of predictions in a wide kinematic range.
American Physical Society
© 2016 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
http://creativecommons.org/licenses/by/3.0/
openAccess
Measurement of top quark pair differential cross sections in the dilepton channel in pp collisions at ffiffi s p = 7 and 8 TeV with ATLAS
Article
Royon, Christophe
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/222772018-02-12T22:27:04Zcom_1808_109col_1808_110
D0 Collaboration
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Adams, T.
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
2016-12-21T17:07:32Z
2016-12-21T17:07:32Z
2015-10-16
Abazov, V. M., Abbott, B., Acharya, B. S., Adams, M., Adams, T., Agnew, J. P., … Askew, A. (2015). Search for Violation of C P T and Lorentz Invariance in B s 0 Meson Oscillations . Physical Review Letters, 115(16). doi:10.1103/physrevlett.115.161601
http://hdl.handle.net/1808/22277
10.1103/PhysRevLett.115.161601
We present the first search for CPT-violating effects in the mixing of B0s mesons using the full Run II data set with an integrated luminosity of 10.4 fb−1 of proton-antiproton collisions collected using the D0 detector at the Fermilab Tevatron Collider. We measure the CPT-violating asymmetry in the decay B0s→μ±D±s as a function of celestial direction and sidereal phase. We find no evidence for CPT-violating effects and place limits on the direction and magnitude of flavor-dependent CPT- and Lorentz-invariance violating coupling coefficients. We find 95% confidence intervals of Δa⊥<1.2×10−12 GeV and (−0.8<ΔaT−0.396ΔaZ<3.9)×10−13 GeV.
American Physical Society (APS)
© 2015 American Physical Society
openAccess
Search for Violation of CPT and Lorentz Invariance in B s O Meson Oscillations
Article
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/153392019-04-12T14:47:53Zcom_1808_109col_1808_110
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Darling, C.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
2014-10-21T18:41:05Z
2014-10-21T18:41:05Z
1998-01-01
J. Gronberg et al. ((CLEO Collaboration)). (1998). "Measurements of the meson-photon transition form factors of light pseudoscalar mesons at large momentum transfer." Physical Review D, 57(1):33. http://dx.doi.org/10.1103/PhysRevD.57.33.
1550-7998
http://hdl.handle.net/1808/15339
10.1103/PhysRevD.57.33
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.57.33.
Using the CLEO II detector, we have measured the differential cross sections for exclusive two-photon production of light pseudoscalar mesons π(0), η, and η′. From our measurements we have obtained the form factors associated with the electromagnetic transitions γ*γ⃗ meson. We have measured these form factors in the momentum transfer ranges from 1.5 to 9, 20, and 30GeV(2) for π(0), η, and η′, respectively, and have made comparisons to various theoretical predictions.
American Physical Society
Measurements of the meson-photon transition form factors of light pseudoscalar mesons at large momentum transfer
Article
openAccess
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Darling, C.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/314642021-02-24T09:01:02Zcom_1808_109col_1808_110
Aartsen, M. G.
Besson, David Zeke
IceCube Collaboration
2021-02-23T22:29:19Z
2021-02-23T22:29:19Z
2019-10-23
M. G. Aartsen et al. (IceCube Collaboration), "Cosmic ray spectrum and composition from PeV to EeV using 3 years of data from IceTop and IceCube", Phys. Rev. D 100, 082002, DOI: 10.1103/PhysRevD.100.082002
http://hdl.handle.net/1808/31464
10.1103/PhysRevD.100.082002
We report on measurements of the all-particle cosmic ray energy spectrum and composition in the PeV to EeV energy range using 3 years of data from the IceCube Neutrino Observatory. The IceTop detector measures cosmic ray induced air showers on the surface of the ice, from which the energy spectrum of cosmic rays is determined by making additional assumptions about the mass composition. A separate measurement is performed when IceTop data are analyzed in coincidence with the high-energy muon energy loss information from the deep in-ice IceCube detector. In this measurement, both the spectrum and the mass composition of the primary cosmic rays are simultaneously reconstructed using a neural network trained on observables from both detectors. The performance and relative advantages of these two distinct analyses are discussed, including the systematic uncertainties and the dependence on the hadronic interaction models, and both all-particle spectra as well as individual spectra for elemental groups are presented.
American Physical Society
© 2019 American Physical Society.
openAccess
Cosmic ray spectrum and composition from PeV to EeV using 3 years of data from IceTop and IceCube
Article
Besson, David Zeke
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/221632018-02-12T21:43:52Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Murray, Michael J.
Sanders, Stephen J.
CMS Collaboration
2016-12-07T17:48:23Z
2016-12-07T17:48:23Z
2015-02-24
Hewamanage, S., Linn, S., Markowitz, P. E., Martinez, G., Rodriguez, J. L., & CMS Collaboration. (2015). Measurement of the production cross section ratio σ (χb2 (1P))/σ (χb1 (1P)) in pp collisions at√ s= 8TeV.
http://hdl.handle.net/1808/22163
10.1016/j.physletb.2015.02.048
A measurement of the production cross section ratio σ(χb2(1P))/σ(χb1(1P))σ(χb2(1P))/σ(χb1(1P)) is presented. The χb1(1P)χb1(1P) and χb2(1P)χb2(1P) bottomonium states, promptly produced in pp collisions at View the MathML sources=8 TeV, are detected by the CMS experiment at the CERN LHC through their radiative decays χb1,2(1P)→ϒ(1S)+γχb1,2(1P)→ϒ(1S)+γ. The emitted photons are measured through their conversion to e+e−e+e− pairs, whose reconstruction allows the two states to be resolved. The ϒ(1S)ϒ(1S) is measured through its decay to two muons. An event sample corresponding to an integrated luminosity of 20.7 fb−120.7 fb−1 is used to measure the cross section ratio in a phase-space region defined by the photon pseudorapidity, |ηγ|<1.0|ηγ|<1.0; the ϒ(1S)ϒ(1S) rapidity, |yϒ|<1.5|yϒ|<1.5; and the ϒ(1S)ϒ(1S) transverse momentum, View the MathML source7<pTϒ<40 GeV. The cross section ratio shows no significant dependence on the ϒ(1S)ϒ(1S) transverse momentum, with a measured average value of View the MathML source0.85±0.07(stat+syst)±0.08(BF), where the first uncertainty is the combination of the experimental statistical and systematic uncertainties and the second is from the uncertainty in the ratio of the χbχb branching fractions.
Elsevier
©2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
http://creativecommons.org/licenses/by/4.0/
openAccess
CMS
Quarkonium production
P-wave states
Bottomonium
Measurement of the production cross section ratio σ(χb2(1P))/σ(χb1(1P))in pp collisions at √s=8TeV
Article
Baringer, Philip S.
Bean, Alice
Murray, Michael J.
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/214162018-12-13T20:00:05Zcom_1808_109col_1808_110
Marquet, Cyrille
Royon, Christophe
2016-08-26T15:30:39Z
2016-08-26T15:30:39Z
2009-02-23
Marquet, C., & Royon, C. (2009). Azimuthal decorrelation of Mueller-Navelet jets at the Tevatron and the LHC. Physical Review D, 79(3), 034028.
http://hdl.handle.net/1808/21416
10.1103/PhysRevD.79.034028
American Physical Society
©2009 American Physical Society
openAccess
Azimuthal decorrelation of Mueller-Navelet jets at the Tevatron and the LHC
Article
Royon, Christophe
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/153672019-04-12T14:45:53Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Coppage, Don
Hebert, C.
2014-10-22T19:32:51Z
2014-10-22T19:32:51Z
2002-07-02
V. M. Abazov et al. ((DØ Collaboration)). (2002). "Improved W boson mass measurement with the DØ detector." Physical Review D, 66(1):012001. http://dx.doi.org/10.1103/PhysRevD.66.012001
1550-7998
http://hdl.handle.net/1808/15367
10.1103/PhysRevD.66.012001
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.66.012001.
We have measured the W boson mass using the DØ detector and a data sample of 82 pb(-1) from the Fermilab Tevatron collider. This measurement uses W⃗ eν decays, where the electron is close to a boundary of a central electromagnetic calorimeter module. Such “edge” electrons have not been used in any previous DØ analysis, and represent a 14% increase in the W boson sample size. For these electrons, new response and resolution parameters are determined, and revised backgrounds and underlying event energy flow measurements are made. When the current measurement is combined with previous DØ W boson mass measurements, we obtain MW=80.483±0.084 GeV. The 8% improvement from the previous DØ measurement is primarily due to the improved determination of the response parameters for non-edge electrons using the sample of Z bosons with non-edge and edge electrons.
American Physical Society
Improved W boson mass measurement with the DØ detector
Article
openAccess
Baringer, Philip S.
Bean, Alice
Coppage, Don
Hebert, C.
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/155172019-04-12T14:47:54Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
2014-11-04T14:32:55Z
2014-11-04T14:32:55Z
2009-11-20
V. M. Abazov et al. (The D0 Collaboration). (2009). "Measurement of the top quark mass in final states with two leptons." Physical Review D, 80(9):092006. http://dx.doi.org/10.1103/PhysRevD.80.092006.
1550-7998
http://hdl.handle.net/1808/15517
10.1103/PhysRevD.80.092006
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.80.092006.
We present measurements of the top quark mass (mt) in tt-bar candidate events with two final state leptons using 1 fb(−1) of data collected by the D0 experiment. Our data sample is selected by requiring two fully identified leptons or by relaxing one lepton requirement to an isolated track if at least one jet is tagged as a b jet. The top quark mass is extracted after reconstructing the event kinematics under the tt-bar hypothesis using two methods. In the first method, we integrate over expected neutrino rapidity distributions, and in the second we calculate a weight for the possible top quark masses based on the observed particle momenta and the known parton distribution functions. We analyze 83 candidate events in the data and obtain mt=176.2±4.8(stat)±2.1(sys) GeV and mt=173.2±4.9(stat)±2.0(sys) GeV for the two methods, respectively. Accounting for correlations between the two methods, we combine the measurements to obtain mt=174.7±4.4(stat)±2.0(sys) GeV.
American Physical Society
Measurement of the top quark mass in final states with two leptons
Article
openAccess
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Wilson, Graham Wallace
Physics and Astronomy
fullparticipation
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/250232017-12-13T20:41:29Zcom_1808_109col_1808_110
Adam, J.
Adamova, D.
Aggarwal, M. M.
Aglieri Rinella, G.
Agnello, M.
Agrawal, N.
Ahammed, Z.
Ahmad, S.
Ahn, S. U.
ALICE Collaboration
2017-09-25T19:16:58Z
2017-09-25T19:16:58Z
2016-05-12
J. Adam et at ALICE Collaboration, Multi-strange baryon production in p–Pb collisions at √sNN = 5.02 TeV. http://dx.doi.org/10.1016/j.physletb.2016.05.027
http://hdl.handle.net/1808/25023
10.1016/j.physletb.2016.05.027
The multi-strange baryon yields in Pb–Pb collisions have been shown to exhibit an enhancement relative to pp reactions. In this work, and production rates have been measured with the ALICE experiment as a function of transverse momentum, pT, in p–Pb collisions at a centre-of-mass energy of √sNN = 5.02 TeV. The results cover the kinematic ranges 0.6 GeV/c < pT < 7.2 GeV/c and 0.8 GeV/c < pT < 5 GeV/c, for and respectively, in the common rapidity interval −0.5 < yCMS < 0. Multi-strange baryons have been identified by reconstructing their weak decays into charged particles. The pT spectra are analysed as a function of event charged-particle multiplicity, which in p–Pb collisions ranges over one order of magnitude and lies between those observed in pp and Pb–Pb collisions. The measured pT distributions are compared to the expectations from a Blast-Wave model. The parameters which describe the production of lighter hadron species also describe the hyperon spectra in high multiplicity p–Pb collisions. The yield of hyperons relative to charged pions is studied and compared with results from pp and Pb–Pb collisions. A continuous increase in the yield ratios as a function of multiplicity is observed in p–Pb data, the values of which range from those measured in minimum bias pp to the ones in Pb–Pb collisions. A statistical model qualitatively describes this multiplicity dependence using a canonical suppression mechanism, in which the small volume causes a relative reduction of hadron production dependent on the strangeness content of the hyperon.
SCOAP3
Elsevier
© 2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
http://creativecommons.org/licenses/by/4.0/
openAccess
Multi-strange baryon production in p–Pb collisions at √sNN = 5.02 TeV
Article
Tapia Takaki, Daniel
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/16942019-04-12T14:31:54Zcom_1808_8219com_1808_109col_1808_8220col_1808_110
Wu, Judy Z.
Siegal, M. P.
Xie, Y. Y.
Aytug, T.
Fang, L.
2007-10-05
2007-10-05
2003-02-01
Yan, SL; Fang, L; Aytug, T; Xie, YY; Wu, JZ; Siegal, MP. Microstructural evolutions in converting epitaxial Tl2Ba2CaCu2Ox thin films to epitaxial HgBa2CaCu2O6+delta thin films. JOURNAL OF APPLIED PHYSICS. FEB 1 2003. 93(3): 1666-1671.
http://hdl.handle.net/1808/1694
10.1063/1.1529305
Superconducting HgBa2CaCu2O6+delta (Hg-1212) thin films were obtained from Tl2Ba2CaCu2Ox (Tl-2212) precursor films using a cation-exchange process. In this process, Tl cations on the precursor lattice were thermally excited and then replaced with Hg cations. The mechanism of such an atomic perturbation process has presented an interesting topic in material research. This work investigated the evolution of the crystalline structure and surface morphology of the film during such a conversion. It has been found that the Hg-1212 films may inherit epitaxy and surface morphology from their Tl2Ba2CaCu2Ox precursor films at the low perturbation energy limit. Although the c-axis lattice constant was reduced from 1.48 rim. for Tl-2212 to 1.27 nm for Hg-1212 during the cation exchange, the in-plane texture of the film remains. The inverse conversion from Hg-1212 to Tl-2212 has also been investigated. Hg-1212 is found to be energetically preferred so that a perturbation above a threshold is required to convert it back to Tl-2212. (C) 2003 American Institute of Physics. [DOI: 10.1063/1.1529305].
en_US
AMER INST PHYSICS
Microstructural evolutions in converting epitaxial Tl2Ba2CaCu2Ox thin films to epitaxial HgBa2CaCu2O6+delta thin films
Article
openAccess
oai:kuscholarworks.ku.edu:1808/270382018-10-26T08:01:29Zcom_1808_109col_1808_110
The Tracker Group of the CMS Collaboration
2018-10-25T17:30:36Z
2018-10-25T17:30:36Z
2017-08
Adam, W., Bergauer, T., Brondolin, E. et al. Eur. Phys. J. C (2017) 77: 567. https://doi.org/10.1140/epjc/s10052-017-5115-z
http://hdl.handle.net/1808/27038
https://doi.org/10.1140/epjc/s10052-017-5115-z
The high luminosity upgrade of the Large Hadron Collider, foreseen for 2026, necessitates the replacement of the CMS experiment’s silicon tracker. The innermost layer of the new pixel detector will be exposed to severe radiation, corresponding to a 1 MeV neutron equivalent fluence of up to Φeq=2×1016 cm−2, and an ionising dose of ≈5 MGy after an integrated luminosity of 3000 fb−1. Thin, planar silicon sensors are good candidates for this application, since the degradation of the signal produced by traversing particles is less severe than for thicker devices. In this paper, the results obtained from the characterisation of 100 and 200 μm thick p-bulk pad diodes and strip sensors irradiated up to fluences of Φeq=1.3×1016 cm−2 are shown.
Springer Verlag
© The Author(s) 2017
Open Access
This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
Funded by SCOAP3
https://creativecommons.org/licenses/by/4.0/
openAccess
Characterisation of irradiated thin silicon sensors for the CMS phase II pixel upgrade
Article
Bean, Alice Louise
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/221672018-02-12T21:47:23Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Murray, Michael J.
Sanders, Stephen J.
CMS Collaboration
2016-12-07T18:32:03Z
2016-12-07T18:32:03Z
2015-08-24
Search for resonant pair production of Higgs bosons decaying to two bottom quark–antiquark pairs in proton–proton collisions at 8 TeV. (2015). Physics Letters B, 749, 560–582. doi:10.1016/j.physletb.2015.08.047
http://hdl.handle.net/1808/22167
10.1016/j.physletb.2015.08.047
A model-independent search for a narrow resonance produced in proton–proton collisions at √s=8TeVand decaying to a pair of 125GeV Higgs bosons that in turn each decays into a bottom quark–antiquark pair is performed by the CMS experiment at the LHC. The analyzed data correspond to an integrated luminosity of 17.9fb−1. No evidence for a signal is observed. Upper limits at a 95% confidence level on the production cross section for such a resonance, in the mass range from 270 to 1100GeV, are reported. Using these results, a radion with decay constant of 1TeV and mass from 300 to 1100GeV, and a Kaluza–Klein graviton with mass from 380 to 830GeV are excluded at a 95% confidence level.
Elsevier
©2015 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
http://creativecommons.org/licenses/by/4.0/
openAccess
CMS
Higgs
di-Higgs
Radion
KK graviton
RS1
Search for resonant pair production of Higgs bosons decaying to two bottom quark–antiquark pairs in proton–proton collisions at 8TeV
Article
Baringer, Philip S.
Bean, Alice
Murray, Michael J.
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/312402021-01-26T09:01:13Zcom_1808_109col_1808_110
Aaboud, M.
Rogan, Christopher
The ATLAS Collaboration
2021-01-25T21:05:34Z
2021-01-25T21:05:34Z
2019-06-10
M. Aaboud et al., "Search for invisible Higgs boson decays in vector boson fusion at s=13TeV with the ATLAS detector", Physics Letters B, Volume 793, 2019, Pages 499-519, ISSN 0370-2693,
https://doi.org/10.1016/j.physletb.2019.04.024.
(http://www.sciencedirect.com/science/article/pii/S0370269319302564)
http://hdl.handle.net/1808/31240
10.1016/j.physletb.2019.04.024
This work is licensed under a Creative Commons Attribution 4.0 International License.
We report a search for Higgs bosons that are produced via vector boson fusion and subsequently decay into invisible particles. The experimental signature is an energetic jet pair with invariant mass of O(1) TeV and O(100) GeV missing transverse momentum. The analysis uses 36.1 fb−1 of pp collision data at √s=13 TeV recorded by the ATLAS detector at the LHC. In the signal region the 2252 observed events are consistent with the background estimation. Assuming a 125 GeV scalar particle with Standard Model cross sections, the upper limit on the branching fraction of the Higgs boson decay into invisible particles is 0.37 at 95% confidence level where 0.28 was expected. This limit is interpreted in Higgs portal models to set bounds on the wimp–nucleon scattering cross section. We also consider invisible decays of additional scalar bosons with masses up to 3 TeV for which the upper limits on the cross section times branching fraction are in the range of 0.3–1.7 pb.
Elsevier
© 2019 The Author(s). Published by Elsevier B.V.
http://creativecommons.org/licenses/by/4.0/
openAccess
Search for invisible Higgs boson decays in vector boson fusion at √s = 13 TeV with the ATLAS detector
Article
Rogan, Christopher
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/192522018-07-13T17:49:33Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Sanders, Stephen J.
Stringer, Robert W.
2015-12-17T20:06:03Z
2015-12-17T20:06:03Z
2014-05-05
Baringer, Phillip S., Alice Bean, Gabriele Benelli, Stephen J. Sanders, and Robert W. Stringer. "Measurements of Tt¯ Spin Correlations and Top-Quark Polarization Using Dilepton Final States in Pp Collisions at S√=7 TeV." Physical Review Letters 112.18 (2013). http://dx.doi.org/10.1103/PhysRevLett.112.182001
http://hdl.handle.net/1808/19252
10.1103/PhysRevLett.112.182001
Spin correlations and polarization in the top quark–antiquark system are measured using dilepton final states produced in pp collisions at the LHC at s√=7 TeV. The data correspond to an integrated luminosity of 5.0 fb−1 collected with the CMS detector. The measurements are performed using events with two oppositely charged leptons (electrons or muons), a significant imbalance in transverse momentum, and two or more jets, where at least one of the jets is identified as originating from a b quark. The spin correlations and polarization are measured through asymmetries in angular distributions of the two selected leptons, unfolded to the parton level. All measurements are found to be in agreement with predictions of the standard model.
American Physical Society
Copyright 2014 American Physical Society. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
http://creativecommons.org/licenses/by-nc/3.0/
openAccess
Measurements of tt¯ Spin Correlations and Top-Quark Polarization Using Dilepton Final States in pp Collisions at s√=7 TeV
Article
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Sanders, Stephen J.
Stringer, Robert W.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/155182019-04-12T14:47:50Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
2014-11-04T14:52:46Z
2014-11-04T14:52:46Z
2009-09-23
V. M. Abazov et al. (D0 Collaboration). "Measurement of trilinear gauge boson couplings from WW+WZ→lνjj events in pp-bar collisions at s√=1.96 TeV." Physical Review D, 80(5):053012. http://dx.doi.org/10.1103/PhysRevD.80.053012
1550-7998
http://hdl.handle.net/1808/15518
10.1103/PhysRevD.80.053012
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.80.053012.
American Physical Society
Measurement of trilinear gauge boson couplings from WW+WZ→lνjj events in pp-bar collisions at s√=1.96 TeV
Article
openAccess
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Wilson, Graham Wallace
Physics and Astronomy
fullparticipation
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/312672021-01-27T09:01:07Zcom_1808_109col_1808_110
Sirunyan, A. M.
Sanders, Stephen J.
CMS Collaboration
2021-01-26T21:32:31Z
2021-01-26T21:32:31Z
2019-10-08
A. M. Sirunyan et al., "Measurement of the top quark polarization and tt¯ spin correlations using dilepton final states in proton-proton collisions at √ s = 13 TeV", Phys. Rev. D 100, 072002, 8 October 2019, American Physical Society, https://doi.org/10.1103/PhysRevD.100.072002
http://hdl.handle.net/1808/31267
10.1103/PhysRevD.100.072002
This work is licensed under a Creative Commons Attribution 4.0 International License.
Measurements of the top quark polarization and top quark pair (t¯t) spin correlations are presented using events containing two oppositely charged leptons (eþe−, eμ∓, or μþμ−) produced in proton proton collisions at a center-of-mass energy of 13 TeV. The data were recorded by the CMS experiment at the LHC in 2016 and correspond to an integrated luminosity of 35.9 fb−1. A set of parton-level normalized differential cross sections, sensitive to each of the independent coefficients of the spin-dependent parts of the tt¯ production density matrix, is measured for the first time at 13 TeV. The measured distributions and extracted coefficients are compared with standard model predictions from simulations at next-to-leadingorder (NLO) accuracy in quantum chromodynamics (QCD), and from NLO QCD calculations including electroweak corrections. All measurements are found to be consistent with the expectations of the standard model. The normalized differential cross sections are used in fits to constrain the anomalous chromomagnetic and chromoelectric dipole moments of the top quark to −0.24 < CtG=Λ2 < 0.07 TeV−2 and −0.33 < CI tG=Λ2 < 0.20 TeV−2, respectively, at the 95% confidence level.
American Physical Society
© 2019 CERN, for the CMS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Measurement of the top quark polarization and tt¯ spin correlations using dilepton final states in proton-proton collisions at √ s = 13 TeV
Article
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/192542018-07-13T17:50:02Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Sanders, Stephen J.
Stringer, Robert W.
2015-12-17T20:34:07Z
2015-12-17T20:34:07Z
2014
Stringer, Robert W., Phillip S. Baringer, Alice Bean, Gabriele Benelli, and Stephen J. Sanders. "Search for Top-Quark Partners with Charge 5/3 in the Same-Sign Dilepton Final State." Physical Review Letters 112.17 (2014). http://dx.doi.org/10.1103/PhysRevLett.112.171801
http://hdl.handle.net/1808/19254
10.1103/PhysRevLett.112.171801
A search for the production of heavy partners of the top quark with charge 5/3 is performed in events with a pair of same-sign leptons. The data sample corresponds to an integrated luminosity of 19.5 fb−1 and was collected at s√=8 TeV by the CMS experiment. No significant excess is observed in the data above the expected background, and the existence of top-quark partners with masses below 800 GeV is excluded at a 95% confidence level, assuming they decay exclusively to tW. This is the first limit on these particles from the LHC, and it is significantly more restrictive than previous limits.
American Physical Society
Copyright © 2014 CERN, for the CMS Collaboration. This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
http://creativecommons.org/licenses/by-nc/3.0/
openAccess
Search for Top-Quark Partners with Charge 5/3 in the Same-Sign Dilepton Final State
Article
Stringer, Robert W.
Baringer, Philip S.
Bean, Alice
Benelli, Gabriele
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/73612019-04-12T14:28:33Zcom_1808_109col_1808_110
Ruzicka, Brian Andrew
Higley, Karl
Werake, Lalani Kumari
Zhao, Hui
2011-04-06T21:56:58Z
2011-04-06T21:56:58Z
2008-07
B.A. Ruzicka, K. Higley, L.K. Werake, and Hui Zhao, All-optical generation and detection of subpicosecond ac spin-current pulses in GaAs, Physical Review B 78, 045314 (2008). http://link.aps.org/doi/10.1103/PhysRevB.78.045314
http://hdl.handle.net/1808/7361
10.1103/PhysRevB.78.045314
Permissions were not obtained for sharing the full text of this article. Full text is available at the American Physical Society and at arXiv. See links in this record.
Subpicosecond ac spin-current pulses are generated optically in GaAs bulk and quantum wells at room temperature and at 90 K through quantum interference between one-photon and two-photon absorptions driven by two phase-locked ultrafast laser pulses that are both circularly polarized. The dynamics of the current pulses are detected optically by monitoring, in real time and in real space, the nanoscale motion of electrons with high-resolution pump probe techniques.
American Physical Society
http://arxiv.org/abs/0806.3901v1
Materials Science
Mesoscale and Nanoscale Physics
All-optical generation and detection of subpicosecond ac spin-current pulses in GaAs
Other
openAccess
Ruzicka, Brian A.
Higley, Karl
Werake, Lalani K.
Zhao, Hui
Physics and Astronomy
publisherdenied
This item does not meet KU Open Access policy criteria. Publisher denied.
oai:kuscholarworks.ku.edu:1808/215182018-12-13T18:16:29Zcom_1808_109col_1808_110
Davoudiasl, Hooman
Lee, Hye-Sung
Lewis, Ian M.
Marciano, William J.
2016-09-14T17:41:22Z
2016-09-14T17:41:22Z
2013-07-16
Davoudiasl, H., Lee, H. S., Lewis, I., & Marciano, W. J. (2013). Higgs decays as a window into the dark sector. Physical Review D, 88(1), 015022.
http://hdl.handle.net/1808/21518
10.1103/PhysRevD.88.015022
American Physical Society
© 2013 American Physical Society
openAccess
Higgs decays as a window into the dark sector
Article
Lewis, Ian
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/311332021-01-15T09:00:58Zcom_1808_109col_1808_110
Aaboud, M.
Rogan, Christopher
The ATLAS collaboration
2021-01-14T19:43:13Z
2021-01-14T19:43:13Z
2019-01-03
The ATLAS collaboration., Aaboud, M., Aad, G. et al. Search for pair production of Higgs bosons in the e b¯bb¯b final state using proton-proton collisions at 𝑠√=13 TeV with the ATLAS detector. J. High Energ. Phys. 2019, 30 (2019). https://doi.org/10.1007/JHEP01(2019)030
http://hdl.handle.net/1808/31133
10.1007/JHEP01(2019)030
This work is licensed under a Creative Commons Attribution 4.0 International License.
A search for Higgs boson pair production in the 𝑏¯𝑏𝑏¯𝑏 final state is carried out with up to 36.1 fb−1 of LHC proton-proton collision data collected at 𝑠√=13 TeV with the ATLAS detector in 2015 and 2016. Three benchmark signals are studied: a spin-2 graviton decaying into a Higgs boson pair, a scalar resonance decaying into a Higgs boson pair, and Standard Model non-resonant Higgs boson pair production. Two analyses are carried out, each implementing a particular technique for the event reconstruction that targets Higgs bosons reconstructed as pairs of jets or single boosted jets. The resonance mass range covered is 260–3000 GeV. The analyses are statistically combined and upper limits on the production cross section of Higgs boson pairs times branching ratio to 𝑏¯𝑏𝑏¯𝑏 are set in each model. No significant excess is observed; the largest deviation of data over prediction is found at a mass of 280 GeV, corresponding to 2.3 standard deviations globally. The observed 95% confidence level upper limit on the non-resonant production is 13 times the Standard Model prediction.
Springer Verlag
Copyright CERN, for the benefit of the ATLAS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Hadron-Hadron scattering (experiments)
Search for pair production of Higgs bosons in the 𝑏¯𝑏𝑏¯𝑏 final state using proton-proton collisions at 𝑠√=13 TeV with the ATLAS detector
Article
Rogan, Christopher
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/14432019-04-12T14:23:24Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Besson, David Zeke
2007-04-14T09:51:35Z
2007-04-14T09:51:35Z
2005-10
Coan, TE, Gao, YS, et al. Absolute branching fraction measurements of exclusive D-0 semileptonic decays. PHYSICAL REVIEW LETTERS. October 2005. 95(18)
http://publish.aps.org/
http://hdl.handle.net/1808/1443
With the first data sample collected by the CLEO-c detector at the psi(3770) resonance we have studied four exclusive semileptonic decays of the D-0 meson. Our results include the first observation and absolute branching fraction measurement for D-0->rho(-)e(+)nu(e) and improved measurements of the absolute branching fractions for D-0 decays to K(-)e(+)nu(e), pi(-)e(+)nu(e), and K(*-)e(+)nu(e).
en_US
AMERICAN PHYSICAL SOC
Absolute branching fraction measurements of exclusive D-0 semileptonic decays
Article
openAccess
Besson, David Zeke
oai:kuscholarworks.ku.edu:1808/155912019-04-12T14:48:09Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
2014-11-05T14:34:48Z
2014-11-05T14:34:48Z
2010-07-26
V. M. Abazov et al. (D0 Collaboration). (2010). "Search for CP violation in B(0)(s)→μ(+)D(−)(s)X decays in pp-bar collisions at s√=1.96 TeV." Physical Review D, 82(1):012003. http://dx.doi.org/10.1103/PhysRevD.82.012003.
1550-7998
http://hdl.handle.net/1808/15591
10.1103/PhysRevD.82.012003
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.82.012003.
American Physical Society
Search for CP violation in B(0)(s)→μ(+)D(−)(s)X decays in pp-bar collisions at s√=1.96 TeV
Article
openAccess
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
McGivern, C.
Wilson, Graham Wallace
Physics and Astronomy
fullparticipation
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/311692021-01-16T09:00:58Zcom_1808_109col_1808_110
Aaboud, M.
Rogan, Christopher
The ATLAS collaboration
2021-01-15T21:50:48Z
2021-01-15T21:50:48Z
2019-07-19
The ATLAS collaboration., Aaboud, M., Aad, G. et al. Search for scalar resonances decaying into μ+μ− in events with and without b-tagged jets produced in proton-proton collisions at √𝑠=13 TeV with the ATLAS detector. J. High Energ. Phys. 2019, 117 (2019). https://doi.org/10.1007/JHEP07(2019)117
http://hdl.handle.net/1808/31169
10.1007/JHEP07(2019)117
This work is licensed under a Creative Commons Attribution 4.0 International License.
A search for a narrow scalar resonance decaying into an opposite-sign muon pair produced in events with and without b-tagged jets is presented in this paper. The search uses 36.1 fb−1 of √𝑠=13 TeV proton-proton collision data recorded by the ATLAS experiment at the LHC. No significant excess of events above the expected Standard Model background is observed in the investigated mass range of 0.2 to 1.0 TeV. The observed upper limits at 95% confidence level on the cross section times branching ratio for b-quark associated production and gluon-gluon fusion are between 1.9 and 41 fb and 1.6 and 44 fb respectively, which is consistent with expectations.
Springer Verlag
Copyright CERN, for the benefit of the ATLAS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Hadron-Hadron scattering (experiments)
Search for scalar resonances decaying into μ+μ− in events with and without b-tagged jets produced in proton-proton collisions at √𝑠=13 TeV with the ATLAS detector
Article
Rogan, Christopher
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/155782019-04-12T14:48:12Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Wilson, Graham Wallace
2014-11-04T19:27:12Z
2014-11-04T19:27:12Z
2009-06-25
V. M. Abazov et al. (D0 Collaboration). (2009). "Search for the Standard Model Higgs Boson in Tau Final States." Physical Review Letters, 120(25):251801. http://dx.doi.org/10.1103/PhysRevLett.102.251801.
0031-9007
http://hdl.handle.net/1808/15578
10.1103/PhysRevLett.102.251801
This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.102.251801.
We present a search for the standard model Higgs boson using hadronically decaying tau leptons, in 1 fb(−1) of data collected with the D0 detector at the Fermilab Tevatron pp-bar collider. We select two final states: τ± plus missing transverse energy and b jets, and τ(+)τ(−) plus jets. These final states are sensitive to a combination of associated W/Z boson plus Higgs boson, vector boson fusion, and gluon-gluon fusion production processes. The observed ratio of the combined limit on the Higgs production cross section at the 95% C.L. to the standard model expectation is 29 for a Higgs boson mass of 115 GeV.
American Physical Society
Search for the Standard Model Higgs Boson in Tau Final States
Article
openAccess
Baringer, Philip S.
Bean, Alice
Clutter, Justace Randall
Moulik, Tania
McGivern, Carrie Lynne
Wilson, Graham Wallace
Physics and Astronomy
fullparticipation
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/347442023-08-17T06:05:34Zcom_1808_109col_1808_110
CMS Collaboration
2023-08-16T18:08:36Z
2023-08-16T18:08:36Z
2023-07-03
Tumasyan, A., Adam, W., Andrejkovic, J.W. et al. Measurement of the differential tt⎯⎯
production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks. Eur. Phys. J. C 83, 560 (2023). https://doi.org/10.1140/epjc/s10052-023-11587-8
https://hdl.handle.net/1808/34744
10.1140/epjc/s10052-023-11587-8
PMC10317917
A measurement of the jet mass distribution in hadronic decays of Lorentz-boosted top quarks is presented. The measurement is performed in the lepton + jets channel of top quark pair production (tt⎯⎯) events, where the lepton is an electron or muon. The products of the hadronic top quark decay are reconstructed using a single large-radius jet with transverse momentum greater than 400GeV. The data were collected with the CMS detector at the LHC in proton-proton collisions and correspond to an integrated luminosity of 138fb−1. The differential tt⎯⎯ production cross section as a function of the jet mass is unfolded to the particle level and is used to extract the top quark mass. The jet mass scale is calibrated using the hadronic W boson decay within the large-radius jet. The uncertainties in the modeling of the final state radiation are reduced by studying angular correlations in the jet substructure. These developments lead to a significant increase in precision, and a top quark mass of 173.06±0.84GeV.
Elsevier
© CERN for the benefit of the CMS collaboration 2023. This article is licensed under a Creative Commons Attribution 4.0 International License.
http://creativecommons.org/licenses/by/4.0/
openAccess
Measurement of the differential tt⎯⎯ production cross section as a function of the jet mass and extraction of the top quark mass in hadronic decays of boosted top quarks
Article
Abreu, A.
Alcerro Alcerro, L. F.
Anguiano, J.
Baringer, P.
Bean, A.
Flowers, Z.
Isidori, T.
King, J.
Krintiras, G.
Lazarovits, M.
Le Mahieu, C.
Lindsey, C.
Marquez, J.
Minafra, N.
Murray, M.
Nickel, M.
Rogan, C.
Royon, C.
Salvatico, R.
Sanders, S.
Smith, C.
Wang, Q.
Williams, J.
Wilson, G.
Physics & Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/13332018-02-16T21:18:58Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Ammar, Raymond G.
Bean, Alice
Besson, David Zeke
Davis, Robin E. P.
Kwak, Nowhan
Zhao, X.
2007-04-09T23:52:31Z
2007-04-09T23:52:31Z
2000-05
Artuso, M, Ayad, R, et al. Search for the decay (B)over-bar(0) -> D*(0)gamma. PHYSICAL REVIEW LETTERS. May 2000. 84(19) : 4292-4295
http://publish.aps.org/
http://hdl.handle.net/1808/1333
We report results of a search for the rare radiative decay (B) over bar(0) --> D*(0)gamma. Using 9.66 x 10(6) <B(B)over bar> meson pairs collected with the CLEO detector at the Cornell Electron Storage Ring, we set an upper limit on the branching ratio for this decay of 5.0 x 10(-5) at 90% C.L. This provides evidence that the anomalous enhancement is absent in W-exchange processes and that weak radiative B decays are dominated by the short-distance b --> s gamma mechanism in the standard model.
en_US
AMERICAN PHYSICAL SOC
Search for the decay (B)over-bar(0) -> D*(0)gamma
Article
openAccess
oai:kuscholarworks.ku.edu:1808/222752018-01-19T18:26:06Zcom_1808_109col_1808_110
Sales Silva, Joao V.
Carraro, Giovanni
Anthony-Twarog, Barbara
Bidin, Christian Moni
Costa, Edgardo
Twarog, Bruce A.
2016-12-20T17:48:42Z
2016-12-20T17:48:42Z
2015-12-21
Sales Silva, J. V., Carraro, G., Anthony-Twarog, B. J., Bidin, C. M., Costa, E., & Twarog, B. A. (2015). PROPERTIES OF THE OPEN CLUSTER TOMBAUGH 1 FROM HIGH-RESOLUTION SPECTROSCOPY AND uvby CaH β PHOTOMETRY . The Astronomical Journal, 151(1), 6. doi:10.3847/0004-6256/151/1/6
http://hdl.handle.net/1808/22275
10.3847/0004-6256/151/1/6
Open clusters can be the key to deepening our knowledge on various issues involving the structure and evolution of the Galactic disk and details of stellar evolution because a cluster's properties are applicable to all its members. However, the number of open clusters with detailed analysis from high-resolution spectroscopy or precision photometry imposes severe limitations on studies of these objects. To expand the number of open clusters with well-defined chemical abundances and fundamental parameters, we investigate the poorly studied, anticenter open cluster Tombaugh 1. Using precision uvbyCaHβ photometry and high-resolution spectroscopy, we derive the cluster's reddening, obtain photometric metallicity estimates, and, for the first time, present a detailed abundance analysis of 10 potential cluster stars (nine clump stars and one Cepheid). Using the radial position from the cluster center and multiple color indices, we have isolated a sample of unevolved, probable single-star members of Tombaugh 1. From 51 stars, the cluster reddening is found to be $E(b-y)$ = 0.221 ± 0.006 or $E(B-V)$ = 0.303 ± 0.008, where the errors refer to the internal standard errors of the mean. The weighted photometric metallicity from m1 and hk is [Fe/H] = −0.10 ± 0.02, while a match to the Victoria-Regina Strömgren isochrones leads to an age of 0.95 ± 0.10 Gyr and an apparent modulus of $(m-M)$ = 13.10 ± 0.10. Radial velocities identify six giants as probable cluster members, and the elemental abundances of Fe, Na, Mg, Al, Si, Ca, Ti, Cr, Ni, Y, Ba, Ce, and Nd have been derived for both the cluster and the field stars. Tombaugh 1 appears to be a typical inner thin disk, intermediate-age open cluster of slightly subsolar metallicity, located just beyond the solar circle, with solar elemental abundance ratios except for the heavy s-process elements, which are a factor of two above solar. Its metallicity is consistent with a steep metallicity gradient in the galactocentric region between 9.5 and 12 kpc. Our study also shows that Cepheid XZ CMa is not a member of Tombaugh 1 and reveals that this Cepheid presents signs of barium enrichment, making it a probable binary star.
IOP Publishing
© 2016. The American Astronomical Society. All rights reserved.
openAccess
Open Clusters and Associations: General
Open Clusters and Associations: Individual (Tombaugh 1)
Stars: Abundances
Stars: Atmospheres
PROPERTIES OF THE OPEN CLUSTER TOMBAUGH 1 FROM HIGH-RESOLUTION SPECTROSCOPY AND uvbyCaHβ PHOTOMETRY
Article
Anthony-Twarog, Barbara
Twarog, Bruce A.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/153852019-04-12T14:48:08Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Coppage, Don
Gardner, J.
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
2014-10-27T13:52:23Z
2014-10-27T13:52:23Z
2006-12-26
V. M. Abazov et al. (D0 Collaboration). (2006). "Measurement of the tt-bar production cross section in pp-bar collisions at s√=1.96 TeV using secondary vertex b tagging." Physical Review D, 74(11)112004. http://dx.doi.org/10.1103/PhysRevD.74.112004
1550-7998
http://hdl.handle.net/1808/15385
10.1103/PhysRevD.74.112004
This the the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.74.112004.
We report a new measurement of the tt-bar production cross section in pp-bar collisions at a center-of-mass energy of 1.96 TeV using events with one charged lepton (electron or muon), missing transverse energy, and jets. Using 425 pb(−1) of data collected using the D0 detector at the Fermilab Tevatron Collider, and enhancing the tt-bar content of the sample by tagging b jets with a secondary vertex tagging algorithm, the tt-bar production cross section is measured to be σpp-bar→tt-bar+X=6.6±0.9(stat+syst)±0.4(lum) pb. This cross section is the most precise D0 measurement to date for tt-bar production and is in good agreement with standard model expectations.
American Physical Society
Measurement of the tt-bar production cross section in pp-bar collisions at s√=1.96 TeV using secondary vertex b tagging
Article
openAccess
Baringer, Philip S.
Baringer, Alice
Coppage, Don
Gardner, J.
Hensel, Carsten
Moulik, Tania
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/256192017-12-08T09:02:36Zcom_1808_109col_1808_110
CMS Collaboration
2017-12-07T22:43:24Z
2017-12-07T22:43:24Z
2016-02-27
Khachatryan, V., Erbacher, R., Carrillo Montoya, C. A., Moon, C. S., Carvalho, W., Górski, M., ... & Ozturk, S. (2015). Measurement of the ratio $ B (B^ 0_s\to J/\psi f_0 (980)) $/$ B (B^ 0_s\to J/\psi\phi (1020)) $ in pp collisions at $\sqrt s $= 7 TeV. Phys. Lett., 756(CERN-PH-EP-2015-003), 84-102.
http://hdl.handle.net/1808/25619
10.1016/j.physletb.2016.02.047
A measurement of the ratio of the branching fractions of the B0smeson to J/ψf0(980)and to J/ψφ(1020)is presented. The J/ψ, f0(980), and φ(1020)are observed through their decays to μ+μ−, π+π−, and K+K−, respectively. The f0and the φare identified by requiring |Mπ+π−−974MeV| <50MeVand |MK+K−−1020MeV| <10MeV. The analysis is based on a data sample of pp collisions at a centre-of-mass energy of 7TeV, collected by the CMS experiment at the LHC, corresponding to an integrated luminosity of 5.3fb−1. The measured ratio is B(B0s→J/ψf0)B(f0→π+π−)B(B0s→J/ψφ)B(φ→K+K−)=0.140 ±0.008 (stat) ±0.023 (syst), where the first uncertainty is statistical and the second is systematic.
Elsevier
©2016 CERN for the benefit of the CMS Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
http://creativecommons.org/licenses/by/4.0/
openAccess
Measurement of the ratio B(B0s→J/ψf0(980))/B(B0s→J/ψφ(1020)) in pp collisions at √s = 7 TeV
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/314512021-02-23T09:00:55Zcom_1808_109col_1808_110
Hamil, O.
Cravens, T. E.
Rahmati, A.
Connerney, J. E. P.
Andersson, L.
2021-02-22T22:46:33Z
2021-02-22T22:46:33Z
2019-07-04
Hamil, O., Cravens, T. E., Rahmati, A., Connerney, J. E. P., & Andersson, L. (2019). Pressure gradients driving ion transport in the topside Martian atmosphere. Journal of Geophysical Research: Space Physics, 124, 6117– 6126. https://doi.org/10.1029/2019JA026670
http://hdl.handle.net/1808/31451
10.1029/2019JA026670
https://orcid.org/0000-0003-2703-7121
https://orcid.org/0000-0003-0912-8353
https://orcid.org/0000-0003-0519-6498
https://orcid.org/0000-0001-7478-6462
https://orcid.org/0000-0002-6384-7036
An edited version of this paper was published by AGU. Copyright 2019 American Geophysical Union.
Magnetic and thermal pressure gradient forces drive plasma flow in the topside ionosphere of Mars. Some of this flow can contribute to ion loss from the planet and thus affect atmospheric evolution. MAVEN measurements of the magnetic field, electron density, and electron temperature, taken over a 3‐year time period, are used to obtain averaged magnetic and thermal pressures in the topside ionosphere versus altitude, solar zenith angle, and latitude. Magnetic pressures are several times greater than thermal pressures for altitudes greater than about 300 km; that is, the plasma beta is less than one. The total pressure increases with altitude in the ionosphere and decreases with increasing solar zenith angle. Using these pressure patterns in the dayside ionosphere to estimate the pressure gradient force in the fluid momentum equation, we estimate horizontal day‐to‐night plasma flow speeds of a few kilometers per second near 400 km.
Wiley
© 2019. American Geophysical Union. All Rights Reserved.
openAccess
Pressure Gradients Driving Ion Transport in the Topside Martian Atmosphere
Article
Hamil, O.
Cravens, T. E.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/178792019-04-12T14:51:33Zcom_1808_109col_1808_110
Wilson, Graham Wallace
Caesar, C.
Simonis, J.
Adachi, T.
Aksyutina, Y.
Alcantara, J.
Altstadt, S.
Alvarez-Pol, H.
Ashwood, N. I.
Aumann, T.
Avdeichikov, V.
Barr, M.
Beceiro, S.
Bemmerer, D.
Benlliure, J.
Bertulani, C. A.
Boretzky, K.
2015-05-28T17:46:56Z
2015-05-28T17:46:56Z
2013-09-16
Caesar, C. et al. (2013). "Beyond the neutron drip line: The unbound oxygen isotopes (25)O and (26)O." Physical Review C, 88(3):34313. http://www.dx.doi.org/10.1103/PhysRevC.88.034313.
http://hdl.handle.net/1808/17879
10.1103/PhysRevC.88.034313
This is the publisher's version, and is also available electronically from http://journals.aps.org/prc/abstract/10.1103/PhysRevC.88.034313.
The very neutron-rich oxygen isotopes 25O and 26O are investigated experimentally and theoretically. The unbound states are populated in an experiment performed at the R3B-LAND setup at GSI via proton-knockout reactions from 26F and 27F at relativistic energies around 442 and 414 MeV/nucleon, respectively. From the kinematically complete measurement of the decay into 24O plus one or two neutrons, the 25O ground-state energy and width are determined, and upper limits for the 26O ground-state energy and lifetime are extracted. In addition, the results provide indications for an excited state in 26O at around 4 MeV. The experimental findings are compared to theoretical shell-model calculations based on chiral two- and three-nucleon (3N) forces, including for the first time residual 3N forces, which are shown to be amplified as valence neutrons are added.
American Physical Society
Beyond the neutron drip line: The unbound oxygen isotopes (25)O and (26)O
Article
openAccess
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/178612019-04-12T14:50:57Zcom_1808_109col_1808_110
Schmitt, K. T.
Jones, K. L.
Bey, A.
Ahn, S.
Bardayan, D. W.
Blackmon, J. C.
Brown, S. M.
Chae, K. Y.
Chipps, K. A.
Cizewski, J. A.
Hahn, K. I.
Kolata, J. J.
Kozub, R. L.
Liang, J. F.
Matei, C.
Matoš, M.
Matyas, D.
Moazen, B.
Nesaraja, C.
Wilson, Graham Wallace
2015-05-28T14:57:54Z
2015-05-28T14:57:54Z
2012-05-08
Schmitt, K. T. et al. (2012). "Halo Nucleus Be11: A Spectroscopic Study via Neutron Transfer." Physical Review Letters, 109(19):192701. http://www.dx.doi.org/10.1103/PhysRevLett.108.192701.
http://hdl.handle.net/1808/17861
10.1103/PhysRevLett.108.192701
This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.108.192701.
American Physical Society
Halo Nucleus Be11: A Spectroscopic Study via Neutron Transfer
Article
openAccess
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/311412021-01-15T09:01:05Zcom_1808_109col_1808_110
Sirunyan, A. M.
Sanders, Stephen J.
The CMS collaboration
2021-01-14T20:48:03Z
2021-01-14T20:48:03Z
2019-02-26
The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Search for new particles decaying to a jet and an emerging jet. J. High Energ. Phys. 2019, 179 (2019). https://doi.org/10.1007/JHEP02(2019)179
http://hdl.handle.net/1808/31141
10.1007/JHEP02(2019)179
This work is licensed under a Creative Commons Attribution 4.0 International License.
A search is performed for events consistent with the pair production of a new heavy particle that acts as a mediator between a dark sector and normal matter, and that decays to a light quark and a new fermion called a dark quark. The search is based on data corresponding to an integrated luminosity of 16.1 fb−1 from proton-proton collisions at √𝑠=13 TeV collected by the CMS experiment at the LHC in 2016. The dark quark is charged only under a new quantum-chromodynamics-like force, and forms an “emerging jet” via a parton shower, containing long-lived dark hadrons that give rise to displaced vertices when decaying to standard model hadrons. The data are consistent with the expectation from standard model processes. Limits are set at 95% confidence level excluding dark pion decay lengths between 5 and 225 mm for dark mediators with masses between 400 and 1250 GeV. Decay lengths smaller than 5 and greater than 225 mm are also excluded in the lower part of this mass range. The dependence of the limit on the dark pion mass is weak for masses between 1 and 10 GeV. This analysis is the first dedicated search for the pair production of a new particle that decays to a jet and an emerging jet.
Springer Verlag
Copyright CERN, for the benefit of the CMS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Search for new particles decaying to a jet and an emerging jet
Article
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/152982019-04-12T14:47:23Zcom_1808_109col_1808_110
Ammar, Raymond G.
Ball, S.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kelly, M.
Kwak, Nowhan
Lam, H.
2014-10-17T14:36:42Z
2014-10-17T14:36:42Z
1994-07-01
M. S. Alam et al. (1994). "Exclusive hadronic B decays to charm and charmonium final states." Physical Review D, 50(1):43. http://dx.doi.org/10.1103/PhysRevD.50.43
1550-7998
http://hdl.handle.net/1808/15298
10.1103/PhysRevD.50.43
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.50.43.
We have fully reconstructed decays of both B¯(0) and B- mesons into final states containing either D, D*, D**, ψ, ψ’, or χc1 mesons. This allows us to obtain new results on many physics topics including branching ratios, tests of the factorization hypothesis, color suppression, resonant substructure, and the B--B¯(0) mass difference.
American Physical Society
Exclusive hadronic B decays to charm and charmonium final states
Article
openAccess
Ammar, Raymond G.
Ball, S.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Copty, N.
Davis, Robin E. P.
Hancock, N.
Kelly, M.
Kwak, Nowhan
Lam, H.
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/268482018-10-18T08:01:10Zcom_1808_109col_1808_110
CMS Collaboration
2018-10-17T19:46:12Z
2018-10-17T19:46:12Z
2017-03-24
Khachatryan, V., Sirunyan, A. M., Tumasyan, A., Adam, W., Asilar, E., Bergauer, T., ... & Flechl, M. (2017). Observation of Charge-Dependent Azimuthal Correlations in p− Pb Collisions and Its Implication for the Search for the Chiral Magnetic Effect. Physical review letters, 118(12), 122301.
http://hdl.handle.net/1808/26848
10.1103/PhysRevLett.118.122301
Charge-dependent azimuthal particle correlations with respect to the second-order event plane in p−Pb and PbPb collisions at a nucleon-nucleon center-of-mass energy of 5.02 TeV have been studied with the CMS experiment at the LHC. The measurement is performed with a three-particle correlation technique, using two particles with the same or opposite charge within the pseudorapidity range |η|<2.4, and a third particle measured in the hadron forward calorimeters (4.4<|η|<5). The observed differences between the same and opposite sign correlations, as functions of multiplicity and η gap between the two charged particles, are of similar magnitude in p−Pb and PbPb collisions at the same multiplicities. These results pose a challenge for the interpretation of charge-dependent azimuthal correlations in heavy ion collisions in terms of the chiral magnetic effect
American Physical Society
Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
http://creativecommons.org/licenses/by/3.0/
openAccess
Observation of Charge-Dependent Azimuthal Correlations in p-Pb Collisions and Its Implication for the Search for the Chiral Magnetic Effect
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/154842019-04-12T14:48:20Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Hensel, Carsten
Moulik, Tania
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
2014-11-03T14:53:47Z
2014-11-03T14:53:47Z
2008-03-11
V. M. Abazov et al. (The D0 Collaboration). (2008). "Measurement of the Shape of the Boson-Transverse Momentum Distribution in pp-bar→Z/γ*→e(+)e(−)+X Events Produced at s√=1.96 TeV." Physical Review Letters, 100(10):102002. http://dx.doi.org/10.1103/PhysRevLett.100.102002
0031-9007
http://hdl.handle.net/1808/15484
10.1103/PhysRevLett.100.102002
This is the publisher's version, also available electronically from http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.100.102002.
We present a measurement of the shape of the Z/γ* boson transverse momentum (q(T)) distribution in pp-bar→Z/γ*→e(+)e(−)+X events at a center-of-mass energy of 1.96 TeV using 0.98 fb(−1) of data collected with the D0 detector at the Fermilab Tevatron collider. The data are found to be consistent with the resummation prediction at low q(T), but above the perturbative QCD calculation in the region of qT>30 GeV/c. Using events with q(T)<30 GeV/c, we extract the value of g(2), one of the nonperturbative parameters for the resummation calculation. Data at large boson rapidity y are compared with the prediction of resummation and with alternative models that employ a resummed form factor with modifications in the small Bjorken x region of the proton wave function.
American Physical Society
Measurement of the Shape of the Boson-Transverse Momentum Distribution in pp-bar→Z/γ*→e(+)e(−)+X Events Produced at s√=1.96 TeV
Article
openAccess
Baringer, Philip S.
Bean, Alice
Hensel, Carsten
Moulik, Tania
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/175342018-12-21T20:17:49Zcom_1808_109col_1808_110
Huang, J. S.
Barmby, P.
Fazio, G. G.
Willner, S. P.
Wilson, Graham Wallace
Rigopoulou, D.
Alonso-Herrero, A.
Dole, H.
Egami, E.
Le Floc'h, E.
Papovich, Casey J.
Pérez-González, P. G.
Rigby, J. R.
Engelbracht, C. W.
Gordon, K. D.
Hines, D. C.
Rieke, M. J.
Rieke, G. H.
Meisenheimer, K.
Miyazaki, S.
2015-04-27T20:03:25Z
2015-04-27T20:03:25Z
2004-09-05
J.-S. Huang et al. "Infrared Array Camera (IRAC) Imaging of the Lockman Hole." Astrophysical Journal Supplement (2004) ApJS 154 44 http://dx.doi.org/10.1086/422882.
http://hdl.handle.net/1808/17534
10.1086/422882
This is the published version, also available here: http://dx.doi.org/10.1086/422882.
IRAC imaging of a 4farcm7 × 4farcm7 area in the Lockman Hole detected over 400 galaxies in the IRAC 3.6 and 4.5 μm bands, 120 in the 5.8 μm band, and 80 in the 8.0 μm band in 30 minutes of observing time. Color-color diagrams suggest that about half of these galaxies are at redshifts 0.6 < z < 1.3 with about a quarter at higher redshifts (z > 1.3). We also detect IRAC counterparts for six of the seven SCUBA sources and all nine XMM-Newton sources in this area. The detection of the counterparts of the SCUBA sources and galaxies at z > 1.3 demonstrates the ability of IRAC to probe the universe at very high redshifts.
American Astronomical Society
Cosmo: obervations
Galaxies: Evolution
Galaxies: High-Redshift
infrared: galaxies
surveys
Infrared Array Camera (IRAC) Imaging of the Lockman Hole
Article
openAccess
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/312282021-01-26T09:00:55Zcom_1808_109col_1808_110
Aaboud, M.
Rogan, Christopher
The ATLAS Collaboration
2021-01-25T19:25:21Z
2021-01-25T19:25:21Z
2019-02-10
M. Aaboud et al., "Correlated long-range mixed-harmonic fluctuations measured in pp, p+Pb and low-multiplicity Pb+Pb collisions with the ATLAS detector", Physics Letters B, Volume 789, 2019, Pages 444-471, ISSN 0370-2693, https://doi.org/10.1016/j.physletb.2018.11.065.
(http://www.sciencedirect.com/science/article/pii/S0370269318309948)
http://hdl.handle.net/1808/31228
10.1016/j.physletb.2018.11.065
This work is licensed under a Creative Commons Attribution 4.0 International License.
Correlations of two flow harmonics vn and vm via three- and four-particle cumulants are measured in 13 TeV pp, 5.02 TeV p+Pb, and 2.76 TeV peripheral Pb+Pb collisions with the ATLAS detector at the LHC. The goal is to understand the multi-particle nature of the long-range collective phenomenon in these collision systems. The large non-flow background from dijet production present in the standard cumulant method is suppressed using a method of subevent cumulants involving two, three and four subevents separated in pseudorapidity. The results show a negative correlation between v2 and v3 and a positive correlation between v2 and v4 for all collision systems and over the full multiplicity range. However, the magnitudes of the correlations are found to depend on the event multiplicity, the choice of transverse momentum range and collision system. The relative correlation strength, obtained by normalisation of the cumulants with the v2 n from a two-particle correlation analysis, is similar in the three collision systems and depends weakly on the event multiplicity and transverse momentum. These results based on the subevent methods provide strong evidence of a similar long-range multi-particle collectivity in pp, p+Pb and peripheral Pb+Pb collisions.
Elsevier
© 2019 The Author. Published by Elsevier B.V.
http://creativecommons.org/licenses/by/4.0/
openAccess
Correlated long-range mixed-harmonic fluctuations measured in pp, p+Pb and low-multiplicity Pb+Pb collisions with the ATLAS detector
Article
Rogan, Christopher
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/311552021-01-16T09:00:59Zcom_1808_109col_1808_110
Aaboud, M.
Rogan, Christopher
The ATLAS collaboration
2021-01-15T19:51:35Z
2021-01-15T19:51:35Z
2019-04-15
The ATLAS collaboration., Aaboud, M., Aad, G. et al. Study of the rare decays of B^0s and B^0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector. J. High Energ. Phys. 2019, 98 (2019). https://doi.org/10.1007/JHEP04(2019)098
http://hdl.handle.net/1808/31155
10.1007/JHEP04(2019)098
This work is licensed under a Creative Commons Attribution 4.0 International License.
A study of the decays B^0s → μ+μ− and B^0 → μ+μ− has been performed using 26.3 fb−1 of 13 TeV LHC proton-proton collision data collected with the ATLAS detector in 2015 and 2016. Since the detector resolution in μ+μ− invariant mass is comparable to the B 0s-B0 mass difference, a single fit determines the signal yields for both decay modes. This results in a measurement of the branching fraction (𝐵^0𝑠→𝜇+𝜇−)=(3.2+1.1−1.0)×10−9 and an upper limit (𝐵^0→𝜇+𝜇−)<4.3×10−10 at 95% confidence level. The result is combined with the Run 1 ATLAS result, yielding (𝐵^0𝑠→𝜇+𝜇−)=(2.8+0.8−0.7)×10−9 and (𝐵^0→𝜇+𝜇−)<2.1×10−10 at 95% confidence level. The combined result is consistent with the Standard Model prediction within 2.4 standard deviations in the (𝐵^0→𝜇+𝜇−)−(𝐵^0𝑠→𝜇+𝜇−) plane.
Springer Verlag
Copyright CERN, for the benefit of the ATLAS Collaboration.
http://creativecommons.org/licenses/by/4.0/
openAccess
Hadron-Hadron scattering (experiments)
Study of the rare decays of B^0s and B^0 mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector
Article
Rogan, Christopher
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/176942018-12-17T18:42:18Zcom_1808_109col_1808_110
Wilson, Graham Wallace
OPAL Collaboration
Abbiendi, G.
Ainsley, C.
Åkesson, P. F.
Alexander, G.
Allison, J.
Amaral, P.
Anagnostou, G.
Anderson, K. J.
Arcelli, S.
2015-05-11T17:14:29Z
2015-05-11T17:14:29Z
2004-09-02
Abbiendi, G. et al. (2004). "Flavour independent search for Higgs bosons decaying into hadronic final states in e^(+)e^(−)e^(+)e^(−) collisions at LEP." Physics Letters B, 597(1):11-25. http://www.dx.doi.org/10.1016/j.physletb.2004.06.083.
http://hdl.handle.net/1808/17694
10.1016/j.physletb.2004.06.083
A search for the Higgsstrahlung process e^(+)e^(−)→hZ is described, where the neutral Higgs boson h is assumed to decay into hadronic final states. In order to be sensitive to a broad range of models, the search is performed independent of the flavour content of the Higgs boson decay. The analysis is based on e^(+)e^(−) collision data collected by the OPAL detector at energies between 192 and 209 GeV. The search does not reveal any significant excess over the Standard Model background prediction. Results are combined with previous searches at energies around 91 and at 189 GeV. A limit is set on the product of the cross-section and the hadronic branching ratio of the Higgs boson, as a function of the Higgs boson mass. Assuming the hZ coupling predicted by the Standard Model, and a Higgs boson decaying only into hadronic final states, a lower bound of 104 GeV/c2104 GeV/c^(2) is set on the mass at the 95% confidence level.
Elsevier
This article is published by Elsevier under a Creative Commons License, and is also available electronically from http://www.sciencedirect.com/science/article/pii/S0370269304009311.
http://creativecommons.org/licenses/by/3.0/
openAccess
Flavour independent search for Higgs bosons decaying into hadronic final states in e^(+)e^(−)e^(+)e^(−) collisions at LEP
Article
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/177352019-04-12T14:53:05Zcom_1808_109col_1808_110
Baringer, Philip S.
Bean, Alice
Chen, G.
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Sekaric, Jadranka
Wilson, Graham Wallace
Aaltonen, T.
Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
2015-05-12T20:09:26Z
2015-05-12T20:09:26Z
2010-07-15
Aaltonen, T. et al. (2010). "Combined Tevatron upper limit on gg→H→W^(+)W^(−) and constraints on the Higgs boson mass in fourth-generation fermion models." Physical Review D, 82(1):11102. http://www.dx.doi.org/10.1103/PhysRevD.82.011102.
http://hdl.handle.net/1808/17735
10.1103/PhysRevD.82.011102
This is the publisher's version, also available electronically from http://journals.aps.org/prd/abstract/10.1103/PhysRevD.82.011102.
American Physical Society
Combined Tevatron upper limit on gg→H→W^(+)W^(−) and constraints on the Higgs boson mass in fourth-generation fermion models
Article
openAccess
Baringer, Philip S.
Bean, Alice
Chen, C.
Clutter, Justace Randall
McGivern, Carrie Lynne
Moulik, Tania
Sekaric, Jadranka
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/14612019-04-12T14:27:57Zcom_1808_109col_1808_110
Ammar, Raymond G.
Baringer, Philip S.
Coppage, Don
Davis, Robin E. P.
Haas, P.
Kelly, M.
Kwak, Nowhan
Lam, H.
Ro, S.
2007-04-14T09:57:09Z
2007-04-14T09:57:09Z
1990-12
AVERY, P, BESSON, D, et al. MEASUREMENT OF THE LAMBDA-C+ DECAY-ASYMMETRY PARAMETER. PHYSICAL REVIEW LETTERS. December 1990. 65(23) : 2842-2845
http://hdl.handle.net/1808/1461
10.1103/PhysRevLett.65.2842
en_US
AMERICAN PHYSICAL SOC
Measurement of the lambda(c)(+) decay asymmetry parameter
Article
openAccess
oai:kuscholarworks.ku.edu:1808/175352019-04-12T14:51:39Zcom_1808_109col_1808_110
Hatsukade, B.
Iono, D.
Akiyama, Toru
Yoshikawa, M.
Dunlop, J. S.
Ivison, R. J.
Peck, A. B.
Ikarashi, S.
Biggs, A. D.
Ezawa, H.
Hanami, H.
Ho, P.
Hughes, D. H.
Kawabe, R.
Kohno, K.
Matsushita, S.
Nakanishi, K.
Padilla, N.
Petitpas, G.
Tamura, Y.
Wagg, J.
Wilner, D. J.
Wilson, Graham Wallace
Yamada, T.
Yun, M. S.
2015-04-27T20:14:34Z
2015-04-27T20:14:34Z
2010-03-10
B. Hatsukade et al. "UNVEILING THE NATURE OF SUBMILLIMETER GALAXY SXDF 850.6." Astrophys.J. (2010) ApJ 711 974 http://dx.doi.org/10.1088/0004-637X/711/2/974.
http://hdl.handle.net/1808/17535
10.1088/0004-637X/711/2/974
This is the published version, also available here: http://dx.doi.org/10.1088/0004-637X/711/2/974.
We present an 880 μm Submillimeter Array (SMA) detection of the submillimeter galaxy SXDF 850.6. SXDF 850.6 is a bright source (S 850 μm = 8 mJy) detected in the SCUBA Half Degree Extragalactic Survey and has multiple possible radio counterparts in its deep radio image obtained at the VLA. Our new SMA detection finds that the submillimeter emission coincides with the brightest radio emission that is found ~8'' north of the coordinates determined from SCUBA. Despite the lack of detectable counterparts in deep UV/optical images, we find a source at the SMA position in near-infrared and longer wavelength images. We perform spectral energy distribution (SED) model fits to UV-optical-IR photometry (u, B, V, R, i', z', J, H, K, 3.6 μm, 4.5 μm, 5.8 μm, and 8.0 μm) and to submillimeter-radio photometry (850 μm, 880 μm, 1100 μm, and 21 cm) independently, and we find both are well described by starburst templates at a redshift of z sime 2.2 ± 0.3. The best-fit parameters from the UV-optical-IR SED fit are a redshift of z = 1.87+0.15 –0.07, a stellar mass of M sstarf = 2.5+2.2 –0.3 × 1011 M ☉, an extinction of AV = 3.0+0.3 –1.0 mag, and an age of 720+1880 –210 Myr. The submillimeter-radio SED fit provides a consistent redshift of z ~ 1.8-2.5, an IR luminosity of L IR = (7-26) ×1012 L ☉, and a star formation rate of 1300-4500 M ☉ yr–1. These results suggest that SXDF 850.6 is a mature system already having a massive amount of old stellar population constructed before its submillimeter bright phase and is experiencing a dusty starburst, possibly induced by major mergers.
American Astronomical Society
Cosmology: Obervations
Galaxies: Evolution
Galaxies: Formation
Galaxies: High-Redshift
Galaxies: Starburst
submilimter: galaxies
Unveiling the Nature of Submillimeter Galaxy SXDF 850.6
Article
openAccess
Wilson, Graham Wallace
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/14032018-02-16T21:57:04Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Ammar, Raymond G.
Baringer, Philip S.
Bean, Alice
Besson, David Zeke
Coppage, Don
Darling, C.
Davis, Robin E. P.
Hancock, N.
Kotov, S.
Kravchenko, I.
Kwak, Nowhan
2007-04-13T20:03:03Z
2007-04-13T20:03:03Z
1996-11
Bergfeld, T, Eisenstein, BI, et al. A search for nonresonant B+->h(+)h(-)h(+) decays. PHYSICAL REVIEW LETTERS. Nonember 1996. 77(22) : 4503-4507
http://publish.aps.org/
http://hdl.handle.net/1808/1403
We use data collected by the CLEO II detector at the Cornell Electron Storage Ring (CESR) to search for B+ --> h(+)h(-)h(+) (nonresonant) decays, where h(+/-) can be either pi(+/-), K-+/-, or p((p) over bar). We see no evidence for signals and set upper limits on the branching fractions in the range (2.8-8.9) x 10(-5). If observed, these decays may display CP violating asymmetries.
en_US
AMERICAN PHYSICAL SOC
A search for nonresonant B+->h(+)h(-)h(+) decays
Article
openAccess
oai:kuscholarworks.ku.edu:1808/13472018-03-05T20:25:15Zcom_1808_5894com_1808_109col_1808_7025col_1808_110
Ammar, Raymond G.
Bean, Alice
Besson, David Zeke
Davis, Robin E. P.
Kwak, Nowhan
Zhao, X.
2007-04-11T18:53:43Z
2007-04-11T18:53:43Z
2000-06
Coan, TE, Fadeyev, V, et al. Study of exclusive radiative B meson decays. PHYSICAL REVIEW LETTERS. June 2000. 84(23) : 5283-5287
http://hdl.handle.net/1808/1347
We have studied exclusive, radiative B meson decays to charmless mesons in 9.7 X 10(6) B (B) over bar decays accumulated with the CLEO detector. We measure B(B-0 --> K*(0)(892)gamma) = (4.55(-0.68)(+0.72) +/- 0.34) X 10(-5) and B(B+ --> K*(+)(892)gamma) = (3.76(-0.83)(+0.89) +/- 0.28) X 10(-5). We have searched for CP asymmetry in B --> K*(892)gamma decays and measure A(CP) = + 0.08 +/- 0.13 +/- 0.03. We report the first observation of B --> K-2*(1430)gamma decays with a branching fraction of (1.66(-0.53)(+0.59) +/- 0.13) x 10(-5). No evidence for the decays B --> rho gamma and B-0 --> omega gamma is found and we limit B(B --> (rho/omega)gamma)/B(B --> K*(892)gamma) < 0.32 at 90% C.L.
en_US
AMERICAN PHYSICAL SOC
http://publish.aps.org/
Study of exclusive radiative B meson decays
Article
openAccess
oai:kuscholarworks.ku.edu:1808/310802021-01-09T09:01:10Zcom_1808_109col_1808_110
Sirunyan, A. M.
Sanders, Stephen J.
CMS Collaboration
2021-01-08T21:15:32Z
2021-01-08T21:15:32Z
2019-03-26
Sirunyan, A.M., Tumasyan, A., Adam, W. et al. Measurement of exclusive Υ photoproduction from protons in pPb collisions at 𝑠NN‾‾‾√=5.02TeV. Eur. Phys. J. C 79, 277 (2019). https://doi.org/10.1140/epjc/s10052-019-6774-8
http://hdl.handle.net/1808/31080
10.1140/epjc/s10052-019-6774-8
This work is licensed under a Creative Commons Attribution 4.0 International License.
The exclusive photoproduction of Υ(nS) meson states from protons, 𝛾p→Υ(nS)p (with n=1,2,3), is studied in ultraperipheral pPb collisions at a centre-of-mass energy per nucleon pair of 𝑠NN‾‾‾√=5.02TeV. The measurement is performed using the Υ(nS)→𝜇+𝜇− decay mode, with data collected by the CMS experiment corresponding to an integrated luminosity of 32.6nb−1. Differential cross sections as functions of the Υ(nS) transverse momentum squared 𝑝2T, and rapidity y, are presented. The Υ(1S) photoproduction cross section is extracted in the rapidity range |𝑦|<2.2, which corresponds to photon–proton centre-of-mass energies in the range 91<𝑊𝛾p<826GeV. The data are compared to theoretical predictions based on perturbative quantum chromodynamics and to previous measurements.
SpringerOpen
© CERN for the benefit of the CMS collaboration 2019.
http://creativecommons.org/licenses/by/4.0/
openAccess
Measurement of exclusive Υ photoproduction from protons in pPb collisions at 𝑠NN‾‾‾√=5.02TeV
Article
Sanders, Stephen J.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/272732018-11-16T16:59:13Zcom_1808_109col_1808_110
ATLAS Collaboration
2018-11-08T21:30:50Z
2018-11-08T21:30:50Z
2017-02-04
Aad, G., Abbott, B., Abdallah, J. et al. Eur. Phys. J. C (2017) 77: 70. https://doi.org/10.1140/epjc/s10052-017-4624-0
http://hdl.handle.net/1808/27273
10.1140/epjc/s10052-017-4624-0
Direct searches for lepton flavour violation in decays of the Higgs and Z bosons with the ATLAS detector at the LHC are presented. The following three decays are considered: H→eτ, H→μτ, and Z→μτ. The searches are based on the data sample of proton–proton collisions collected by the ATLAS detector corresponding to an integrated luminosity of 20.3 fb−1 at a centre-of-mass energy of s√=8 TeV. No significant excess is observed, and upper limits on the lepton-flavour-violating branching ratios are set at the 95% confidence level: Br(H→eτ)<1.04%, Br(H→μτ)<1.43%, and Br(Z→μτ)<1.69×10−5.
SCOAP3
SpringerOpen
© CERN for the benefit of the ATLAS collaboration 2017. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
https://creativecommons.org/licenses/by/4.0/
openAccess
Search for lepton-flavour-violating decays of the Higgs and Z bosons with the ATLAS detector
Article
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/269072018-11-16T19:33:55Zcom_1808_109col_1808_110
CMS Collaboration
2018-10-22T19:43:09Z
2018-10-22T19:43:09Z
2017-04
The CMS collaboration, Sirunyan, A.M., Tumasyan, A. et al. J. High Energ. Phys. (2017) 2017: 136. https://doi.org/10.1007/JHEP04(2017)136
http://hdl.handle.net/1808/26907
https://doi.org/10.1007/JHEP04(2017)136
A search is performed for electroweak production of a vector-like top quark partner T of charge 2/3 in association with a standard model top or bottom quark, using 2.3 fb−1 of proton-proton collision data at s√=13 TeV collected by the CMS experiment at the CERN LHC. The search targets T quarks decaying to a top quark and a Higgs boson in fully hadronic final states. For a T quark with mass above 1 TeV the daughter top quark and Higgs boson are highly Lorentz-boosted and can each appear as a single hadronic jet. Jet substructure and b tagging techniques are used to identify the top quark and Higgs boson jets, and to suppress the standard model backgrounds. An excess of events is searched for in the T quark candidate mass distribution in the data, which is found to be consistent with the expected backgrounds. Upper limits at 95% confidence level are set on the product of the single T quark production cross sections and the branching fraction B(T→tH), and these vary between 0.31 and 0.93 pb for T quark masses in the range 1000-1800 GeV. This is the first search for single electroweak production of a vector-like T quark in fully hadronic final states.
Springer Verlag
© The Author(s) 2017
https://creativecommons.org/licenses/by/4.0/
openAccess
Beyond Standard Model
Hadron-Hadron scattering (experiments)
Top physics
Search for electroweak production of a vector-like quark decaying to a top quark and a Higgs boson using boosted topologies in fully hadronic final states
Article
Baringer, Philip, S.
Physics and Astronomy
Scholarly/refereed, publisher version
This item meets KU Open Access policy criteria.
oai:kuscholarworks.ku.edu:1808/213432018-02-12T21:48:10Zcom_1808_109col_1808_110
Boonekamp, M.
Peschanski, R.
Royon, Christophe
2016-08-16T19:45:13Z
2016-08-16T19:45:13Z
2001-12-03
Boonekamp, M., Peschanski, R., & Royon, C. (2001). Inclusive Higgs boson and dijet production via double pomeron exchange. Physical review letters, 87(25), 251806.
http://hdl.handle.net/1808/21343
10.1103/PhysRevLett.87.251806
We evaluate inclusive Higgs boson and dijet cross sections at the Fermilab Tevatron collider via double Pomeron exchange. Such inclusive processes, normalized to the observed dijet rate observed at Run I, noticeably increase the predictions for tagged (anti)protons in Run II with respect to exclusive production, with the potentiality of Higgs boson detection.
American Physical Society
©2001 American Physical Society
openAccess
Inclusive Higgs Boson and Dijet Production via Double Pomeron Exchange
Article
Royon, Christophe
Physics and Astronomy
Scholarly/refereed, publisher version
This item does not meet KU Open Access policy criteria.
dim///col_1808_110/100