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000599226 005__ 20231204212020.0
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000599226 0247_ $$2datacite_doi$$a10.3204/PUBDB-2023-07233
000599226 037__ $$aPUBDB-2023-07233
000599226 041__ $$aEnglish
000599226 088__ $$2Atlas$$aATLAS-CONF-2023-065
000599226 1001_ $$0P:(DE-HGF)0$$aATLAS Collaboration$$b0$$eCollaboration author
000599226 245__ $$aInclusive and differential cross section measurements of $t\bar{t}Z$ production in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector, including EFT and spin correlations interpretations
000599226 260__ $$c2023
000599226 300__ $$a85
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000599226 500__ $$aKeywords: TOP ; TOP+X ; cross section ; inclusive ; differential ; unfolding ; multilepton ; eft ; effective field theory ; ttbar+boson
000599226 520__ $$aMeasurements of both the inclusive and differential production cross sections of a top-quark-antiquark pair in association with a $Z$ boson ($t\bar{t}Z$) are presented. Final states with two, three and four isolated leptons (electrons or muons) are targeted. The measurements use the data recorded by the ATLAS detector in $pp$ collisions at $\sqrt{s}=13$~TeV at the Large Hadron Collider during the years 2015-2018, corresponding to an integrated luminosity of $140$ fb$^{-1}$. The inclusive cross section is measured to be $\sigma_{t\bar{t}Z}= 0.86 \pm 0.04~\mathrm{(stat.)} \pm 0.04~\mathrm{(syst.)}~$pb and found to be in agreement with the most advanced Standard Model predictions. The differential measurements are presented as a function of a number of observables that probe the kinematics of the $t\bar{t}Z$ system. Both absolute and normalised differential cross section measurements are performed at particle- and parton-level for specific fiducial volumes, and are compared with theoretical predictions at NLO+NNLL. The results are interpreted in the framework of the Standard Model Effective Field Theory and used to set limits on a large number of dimension-6 operators involving the top quark. The first measurement of spin correlations in $t\bar{t}Z$ is presented: the results are in agreement with the Standard Model expectations, and the null hypothesis of no spin correlations is disfavoured with a significance of $1.8$ standard deviations.
000599226 536__ $$0G:(DE-HGF)POF4-611$$a611 - Fundamental Particles and Forces (POF4-611)$$cPOF4-611$$fPOF IV$$x0
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000599226 650_7 $$2autogen$$aTOP
000599226 650_7 $$2autogen$$aTOP+X
000599226 650_7 $$2autogen$$across section
000599226 650_7 $$2autogen$$ainclusive
000599226 650_7 $$2autogen$$adifferential
000599226 650_7 $$2autogen$$aunfolding
000599226 650_7 $$2autogen$$amultilepton
000599226 650_7 $$2autogen$$aeft
000599226 650_7 $$2autogen$$aeffective field theory
000599226 650_7 $$2autogen$$attbar+boson
000599226 693__ $$0EXP:(DE-H253)LHC-Exp-ATLAS-20150101$$1EXP:(DE-588)4398783-7$$5EXP:(DE-H253)LHC-Exp-ATLAS-20150101$$aLHC$$eLHC: ATLAS$$x0
000599226 8564_ $$uhttps://bib-pubdb1.desy.de/record/599226/files/ATLAS-CONF-2023-065.pdf$$yOpenAccess
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000599226 9141_ $$y2023
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000599226 915__ $$0LIC:(DE-HGF)CCBY4$$2HGFVOC$$aCreative Commons Attribution CC BY 4.0
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