% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Aad:601869, author = {Aad, Georges and others}, collaboration = {{ATLAS Collaboration}}, title = {{I}nclusive and differential cross-section measurements of $t\bar{t}{Z}$ production in $pp$ collisions at $\sqrt{s}=13$ {T}e{V} with the {ATLAS} detector, including {EFT} and spin-correlation interpretations}, reportid = {PUBDB-2024-00381, arXiv:2312.04450. CERN-EP-2023-252}, year = {2023}, note = {101 pages in total, author list starting page 84, 31 figures, 27 tables, submitted to JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2020-20}, abstract = {Measurements of both the inclusive and differential production cross sections of a top-quark-top-antiquark pair in association with a $Z$ boson ($t\bar{t}Z$) are presented. Final states with two, three or 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 the absolute and normalised differential cross-section measurements are performed at particle level and parton level for specific fiducial volumes, and are compared with NLO+NNLL theoretical predictions. The results are interpreted in the framework of 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 $t\bar{t}Z$ events 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.}, keywords = {top, pair production (INSPIRE) / spin, correlation (INSPIRE) / p p, scattering (INSPIRE) / cross section, measured (INSPIRE) / effective field theory (INSPIRE) / ATLAS (INSPIRE) / differential cross section (INSPIRE) / TeV (INSPIRE) / muon (INSPIRE) / electron (INSPIRE) / lepton (INSPIRE) / CERN LHC Coll (INSPIRE) / kinematics (INSPIRE) / parton (INSPIRE)}, cin = {ATLAS}, cid = {I:(DE-H253)ATLAS-20120731}, pnm = {611 - Fundamental Particles and Forces (POF4-611)}, pid = {G:(DE-HGF)POF4-611}, experiment = {EXP:(DE-H253)LHC-Exp-ATLAS-20150101}, typ = {PUB:(DE-HGF)25}, eprint = {2312.04450}, howpublished = {arXiv:2312.04450}, archivePrefix = {arXiv}, SLACcitation = {$\%\%CITATION$ = $arXiv:2312.04450;\%\%$}, doi = {10.3204/PUBDB-2024-00381}, url = {https://bib-pubdb1.desy.de/record/601869}, }