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| CMS-PAS-TOP-18-009 | ||
| Measurement of top quark pair production in association with a Z boson in proton-proton collisions at $\sqrt{s} = $ 13 TeV | ||
| CMS Collaboration | ||
| March 2019 | ||
| Abstract: A measurement of the 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 in the three- and four-lepton final states. The production cross section is measured to be $\sigma(\mathrm{t}\overline{\mathrm{t}}\mathrm{Z})= $ 1.00$ ^{+0.06}_{-0.05}$ (stat)$^{+0.07}_{-0.06}$ (syst) pb. Differential cross sections are measured as a function of the transverse momentum of the Z boson and the angular distribution of the decay lepton. New stringent limits on the anomalous couplings of the top quark to the Z boson are obtained, including estimates of Wilson coefficients of standard model effective field theory. | ||
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Links:
CDS record (PDF) ;
inSPIRE record ;
CADI line (restricted) ;
These preliminary results are superseded in this paper, JHEP 03 (2020) 056. The superseded preliminary plots can be found here. |
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Compact Muon Solenoid LHC, CERN |
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