dc.contributor.author | CMS Collaboration | |
dc.date.accessioned | 2022-08-31T19:48:27Z | |
dc.date.available | 2022-08-31T19:48:27Z | |
dc.date.issued | 2020-03-10 | |
dc.identifier.citation | The CMS collaboration., Sirunyan, A.M., Tumasyan, A. et al. Measurement of top quark pair production in association with a Z boson in proton-proton collisions at s√ = 13 TeV. J. High Energ. Phys. 2020, 56 (2020). https://doi.org/10.1007/JHEP03(2020)056 | en_US |
dc.identifier.uri | http://hdl.handle.net/1808/33373 | |
dc.description.abstract | A measurement of the inclusive cross section of top quark pair production in association with a Z boson using proton-proton collisions at a center-of-mass energy of 13 TeV at the LHC is performed. The data sample corresponds to an integrated luminosity of 77.5 fb−1, collected by the CMS experiment during 2016 and 2017. The measurement is performed using final states containing three or four charged leptons (electrons or muons), and the Z boson is detected through its decay to an oppositely charged lepton pair. The production cross section is measured to be σ(tt¯Z) = 0.95 ± 0.05 (stat) ± 0.06 (syst) pb. For the first time, differential cross sections are measured as functions of the transverse momentum of the Z boson and the angular distribution of the negatively charged lepton from the Z boson decay. The most stringent direct limits to date on the anomalous couplings of the top quark to the Z boson are presented, including constraints on the Wilson coefficients in the framework of the standard model effective field theory. | en_US |
dc.publisher | Springer | en_US |
dc.rights | Copyright CERN, for the benefit of the CMS Collaboration. This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0). | en_US |
dc.rights.uri | http://creativecommons.org/licenses/by/4.0/ | en_US |
dc.subject | Hadron-Hadron scattering (experiments) | en_US |
dc.subject | Top physics | en_US |
dc.title | Measurement of top quark pair production in association with a Z boson in proton-proton collisions at s√ = 13 TeV | en_US |
dc.type | Article | en_US |
kusw.kuauthor | Bean, Alice Louise | |
kusw.kudepartment | Physics & Astronomy | en_US |
dc.identifier.doi | 10.1007/JHEP03(2020)056 | 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 |