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Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at $$\sqrt{s} = 13$$ s = 13  TeV with the ATLAS detector

dc.contributor.authorMore than 100 authorsen_US
dc.date.accessioned2022-08-10T17:10:19Z
dc.date.available2022-08-10T17:10:19Z
dc.date.issued2021-08-16
dc.identifier.citationThe European Physical Journal C. 2021 Aug 16;81(8):737
dc.identifier.urihttps://doi.org/10.1140/epjc/s10052-021-09439-4
dc.identifier.urihttps://hdl.handle.net/2027.42/173229en
dc.descriptionFor a complete list of authors, please look at article.en_US
dc.description.abstractAbstract Measurements of both the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson ( $$t{\bar{t}}Z$$ t t ¯ Z ) are presented. The measurements are performed by targeting final states with three or four isolated leptons (electrons or muons) and are based on $$\sqrt{s} = 13$$ s = 13  TeV proton–proton collision data with an integrated luminosity of 139  $$\hbox {fb}^{-1}$$ fb - 1 , recorded from 2015 to 2018 with the ATLAS detector at the CERN Large Hadron Collider. The inclusive cross section is measured to be $$\sigma _{t{\bar{t}}Z} = 0.99 \pm 0.05$$ σ t t ¯ Z = 0.99 ± 0.05  (stat.)  $$\pm \, 0.08$$ ± 0.08  (syst.) pb, in agreement with the most precise theoretical predictions. The differential measurements are presented as a function of a number of kinematic variables which probe the kinematics of the $$t{\bar{t}}Z$$ t t ¯ Z system. Both absolute and normalised differential cross-section measurements are performed at particle and parton levels for specific fiducial volumes and are compared with theoretical predictions at different levels of precision, based on a $$\chi ^{2}/$$ χ 2 / ndf and p value computation. Overall, good agreement is observed between the unfolded data and the predictions.
dc.titleMeasurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at $$\sqrt{s} = 13$$ s = 13  TeV with the ATLAS detector
dc.typeJournal Article
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/173229/1/10052_2021_Article_9439.pdf
dc.identifier.doihttps://dx.doi.org/10.7302/4960
dc.language.rfc3066en
dc.rights.holderThe Author(s)
dc.date.updated2022-08-10T17:10:15Z
dc.owningcollnameInterdisciplinary and Peer-Reviewed


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