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Measurement of the t¯tZ and t¯tW cross sections in proton-proton collisions at √s = 13 TeV with the ATLAS detector
dc.contributor.author | Aaboud, M. | |
dc.contributor.author | Rogan, Christopher | |
dc.contributor.author | ATLAS Collaboration | |
dc.date.accessioned | 2021-01-27T21:01:19Z | |
dc.date.available | 2021-01-27T21:01:19Z | |
dc.date.issued | 2019-04-29 | |
dc.identifier.citation | M. Aaboud et al., "Measurement of the t¯tZ and t¯tW cross sections in proton-proton collisions at √s = 13 TeV with the ATLAS detector", Phys. Rev. D 99, 072009, 29 April 2019, American Physical Society, https://doi.org/10.1103/PhysRevD.99.072009 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/31283 | |
dc.description | This work is licensed under a Creative Commons Attribution 4.0 International License. | en_US |
dc.description.abstract | A measurement of the associated production of a top-quark pair (t¯t) with a vector boson (W, Z) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented, using 36.1 fb−1 of integrated luminosity collected by the ATLAS detector at the Large Hadron Collider. Events are selected in channels with two same- or opposite-sign leptons (electrons or muons), three leptons or four leptons, and each channel is further divided into multiple regions to maximize the sensitivity of the measurement. The t¯tZ and t¯tW production cross sections are simultaneously measured using a combined fit to all regions. The best-fit values of the production cross sections are σt¯tZ = 0.95 ± 0.08 stat ± 0.10 syst pb and σt¯tW = 0.87 ± 0.13 stat ± 0.14 syst pb in agreement with the Standard Model predictions. The measurement of the t¯tZ cross section is used to set constraints on effective field theory operators which modify the t¯tZ vertex. | en_US |
dc.publisher | American Physical Society | en_US |
dc.rights | © 2019 CERN, for the ATLAS Collaboration. | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_US |
dc.title | Measurement of the t¯tZ and t¯tW cross sections in proton-proton collisions at √s = 13 TeV with the ATLAS detector | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Rogan, Christopher | |
kusw.kudepartment | Physics and Astronomy | en_US |
dc.identifier.doi | 10.1103/PhysRevD.99.072009 | en_US |
kusw.oaversion | Scholarly/refereed, publisher version | en_US |
kusw.oapolicy | This item meets KU Open Access policy criteria. | en_US |
dc.rights.accessrights | openAccess | en_US |