Now showing items 21-40 of 1866

    • What Can We Learn from Entanglement and Quantum Tomography? 

      Ralston, John P. (MDPI, 2022-11-12)
      Entanglement has become a hot topic in nuclear and particle physics, although many physicists are not sure they know what it means. We maintain that an era of understanding and using quantum mechanics on a dramatically new ...
    • The Status and Future of Color Transparency and Nuclear Filtering 

      Jain, Pankaj; Pire, Bernard; Ralston, John P. (MDPI, 2022-05-20)
      Fourty years after its introduction, the phenomenon of color transparency remains a domain of controversial interpretations of experimental data. In this review, present evidence for or against color transparency manifestation ...
    • The Dirac form factor predicts the Pauli form factor in the Endpoint Model 

      Dagaonkar, Sumeet K.; Jain, Pankaj; Ralston, John P. (SpringerOpen, 2016-07-04)
      We compute the momentum-transfer dependence of the proton Pauli form factor 𝐹2 in the Endpoint overlap Model. We find the model correctly reproduces the scaling of the ratio of 𝐹2 with the Dirac form factor 𝐹1 observed ...
    • Uncovering the scaling laws of hard exclusive hadronic processes in a comprehensive endpoint model 

      Dagaonkar, Sumeet K.; Jain, Pankaj; Ralston, John P. (SpringerOpen, 2014-08-12)
      We show that an endpoint-overlap model can explain the scaling laws observed in exclusive hadronic reactions at large momentum transfer. The model assumes one of the valence quarks carries most of the hadron momentum. ...
    • Evidence for Evolution or Bias in Host Extinctions of Type 1a Supernovae at High Redshift 

      Jain, Pankaj; Ralston, John P. (American Astronomical Society, 2006-01-20)
      Type 1a supernova magnitudes conventionally include an additive parameter called the extinction coefficient. We find that the extinction coefficients of a popular "gold" set are well correlated with the deviation of ...
    • Hollow Galactic Halos of Fermionic Dark Matter 

      John P., Ralston; Lesley L., Smith (American Astronomical Society, 1991-01-20)
      Fermi statistics and velocity anisotropy give a surprisingly rich structure to massive neutrino dark matter halos. If a spherically symmetric halo has an anisotropic phase space, then hollow halos with a minimum of the ...
    • Direct determination of astronomical distances and proper motions by interferometric parallax 

      Jain, P.; Ralston, John P. (EDP Sciences, 2008-04-28)
      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 ...
    • Early Release Science of the exoplanet WASP-39b with JWST NIRISS 

      Brande, Jonathan; Crossfield, Ian J. M. (Nature Research, 2023-01-09)
      The Saturn-mass exoplanet WASP-39b has been the subject of extensive efforts to determine its atmospheric properties using transmission spectroscopy1,2,3,4. However, these efforts have been hampered by modelling degeneracies ...
    • Early Release Science of the exoplanet WASP-39b with JWST NIRSpec G395H 

      Brande, Jonathan; Crossfield, Ian J. M. (Nature Research, 2023-01-09)
      Measuring the abundances of carbon and oxygen in exoplanet atmospheres is considered a crucial avenue for unlocking the formation and evolution of exoplanetary systems1,2. Access to the chemical inventory of an exoplanet ...
    • Photochemically produced SO2 in the atmosphere of WASP-39b 

      Crossfield, Ian J. M. (Nature Research, 2023-04-26)
      Photochemistry is a fundamental process of planetary atmospheres that regulates the atmospheric composition and stability1. However, no unambiguous photochemical products have been detected in exoplanet atmospheres so far. ...
    • Early Release Science of the exoplanet WASP-39b with JWST NIRSpec PRISM 

      Crossfield, Ian J. M.; Brande, Jonathan (Nature Research, 2023-01-09)
      Transmission spectroscopy1,2,3 of exoplanets has revealed signatures of water vapour, aerosols and alkali metals in a few dozen exoplanet atmospheres4,5. However, these previous inferences with the Hubble and Spitzer Space ...
    • Early Release Science of the exoplanet WASP-39b with JWST NIRCam 

      Brande, Jonathan; Crossfield, Ian J. M. (Nature Research, 2023-01-09)
      Measuring the metallicity and carbon-to-oxygen (C/O) ratio in exoplanet atmospheres is a fundamental step towards constraining the dominant chemical processes at work and, if in equilibrium, revealing planet formation ...
    • Mid-infrared interference coatings with excess optical loss below 10 ppm 

      Winkler, G.; Perner, L. W.; Truong, G.-W.; Zhao, G.; Bachmann, D.; Mayer, A. S.; Fellinger, J.; Follman, D.; Heu, P.; Deutsch, C.; Bailey, D. M.; Peelaers, H.; Puchegger, S.; Fleisher, A. J.; Cole, G. D.; Heckl, O. H. (Optica, 2021-05-14)
      Low excess optical loss, combined absorption and scatter loss, is a key performance metric for any high-reflectance coating technology and is currently one of the main limiting factors for the application of optical ...
    • Fourier Analysis of Magnetic Fields in the Ionosphere of Mars 

      Cravens, Thomas (2023-02-11)
      The two main sources of magnetic field for the Martian ionosphere are the solar wind magnetic fields (i.e., the interplanetary magnetic field), and, particularly in the southern hemisphere, remnant crustal magnetization. ...
    • Exclusive Four-pion Photoproduction in Ultra-peripheral Heavy-ion Collisions at RHIC and LHC Energies 

      Kłusek-Gawenda, M.; Tapia Takaki, J. Daniel (Polish Academy of Arts and Sciences, 2020-01-07)
      We study the photoproduction of exclusive 2π+2π− mesons in ultra-peripheral heavy-ion collisions at the RHIC and LHC energies. Predictions in photon–nucleus interactions are calculated for various resonances at central and ...
    • Search for light pseudoscalar boson pairs produced from decays of the 125 GeV Higgs boson in final states with two muons and two nearby tracks in pp collisions at √s = 13 TeV 

      CMS Collaboration (Elsevier, 2020-01-10)
      A search is presented for pairs of light pseudoscalar bosons, in the mass range from 4 to 15 GeV, produced from decays of the 125 GeV Higgs boson. The decay modes considered are final states that arise when one of the ...
    • Elastic differential cross-section dσ/dt at s√=2.76 TeV and implications on the existence of a colourless C-odd three-gluon compound state 

      Antchev, G.; Aspell, P.; Atanassov, I.; Avati, V.; Baechler, J.; Baldenegro Barrera, C.; Berardi, V.; Berretti, M.; Bossini, E.; Bottigli, U.; Bozzo, M.; Burkhardt, H.; Cafagna, F.S.; Catanesi, M.G.; Csanád, M.; Csörgő, T.; Deile, M.; De Leonardis, F.; Doubek, M.; Druzhkin, D.; Eggert, K.; Eremin, V.; Ferro, F.; Fiergolski, A.; Garcia, F.; Georgiev, V.; Giani, S.; Grzanka, L.; Hammerbauer, J.; Ivanchenko, V.; Kašpar, J.; Kopal, J.; Kundrát, V.; Lami, S.; Latino, G.; Lauhakangas, R.; Lindsey, C.; Lokajícek, M.V.; Losurdo, L.; Lo Vetere, M.; Lucas Rodríguez, F.; Macrí, M.; Malawski, M.; Minafra, N.; Minutoli, S.; Naaranoja, T.; Nemes, F.; Niewiadomski, H.; Novák, T.; Oliveri, E.; Oljemark, F.; Oriunno, M.; Österberg, K.; Palazzi, P.; Passaro, V.; Peroutka, Z.; Procházka, J.; Quinto, M.; Radermacher, E.; Radicioni, E.; Ravotti, F.; Robutti, E.; Royon, C.; Ruggiero, G.; Saarikko, H.; Scribano, A.; Smajek, J.; Snoeys, W.; Sziklai, J.; Taylor, C.; Tcherniaev, E.; Turini, N.; Vacek, V.; Welti, J.; Williams, J. (SpringerOpen, 2020-02-05)
      The proton–proton elastic differential cross section dσ/dt has been measured by the TOTEM experiment at s√=2.76 TeV energy with β∗=11 m beam optics. The Roman Pots were inserted to 13 times the transverse beam size from ...
    • Exclusive Diffraction at the LHC On behalf of the ATLAS, LHCb, CMS and TOTEM experiments 

      Royon, Christophe (EDP Open, 2020-06-16)
      In this report, we describe the most recent results on exclusive diffraction from the ATLAS, CMS, LHCb, TOTEM experiments at the LHC concerning exclusive pions, J/Ψ, Ψ(2S ), dilepton, diphoton, WW productions and prospects ...
    • Probing BFKL dynamics at hadronic colliders in jet gap jet events 

      Royon, Christophe; Deganutti, Federico (EDP Open, 2020-06-16)
      In this report, we give the Balitsky Fadin Kuraev Lipton formalism for jet gap jet events at hadronic colliders. We also discuss the case where in addition at least one proton is intact in the final state in diffractive events.
    • Timing information at HL-LHC: complete determination of masses of dark matter and long lived particle 

      Flowers, Zachary; Kang, Dong Woo; Meier, Quinn; Park, Seong Chan; Rogan, Christopher (Springer, 2020-03-24)
      A long-standing kinematic challenge in data analysis at hadron colliders is the determination of the masses of invisible particles. This issue is particularly relevant in searches for evidence of dark matter production, ...