CMS-PAS-SMP-19-001

CMS-PAS-SMP-19-001
Measurement of the $\textrm{pp} \rightarrow \textrm{Z}\textrm{Z}$ production cross section at $\sqrt{s} =$ 13 TeV with the Run 2 data set
CMS Collaboration
March 2019

Abstract: Four-lepton production in proton-proton collisions, $\textrm{pp} \rightarrow (\textrm{Z}/\gamma^)(\textrm{Z}/\gamma^) \rightarrow 4\ell$ , where $\ell$ = e or $\mu$ , is studied at a center-of-mass energy of 13 TeV with the CMS detector at the LHC. The data samples correspond to integrated luminosities of 41.5 and 59.7 fb $^{-1}$ , collected in 2017 and 2018 running periods respectively. By combining the 2017 and 2018 results with the previously published 2016 results, the ZZ production cross section is measured, $\sigma_{tot} (\textrm{pp} \rightarrow \textrm{ZZ}) =$ 17.1 $\pm$ 0.3 (stat) $\pm$ 0.4 (syst) $\pm$ 0.4 (theo) $\pm$ 0.3 (lumi) pb, for events with two opposite-sign, same-flavor lepton pairs produced in the mass region 60 $< m_{\ell^+\ell^-} <$ 120 GeV. The measured cross section value is consistent with standard model predictions.
Links: CDS record (PDF) ; inSPIRE record ; CADI line (restricted) ; These preliminary results are superseded in this paper, EPJC 81 (2021) 200. The superseded preliminary plots can be found here.

CMS Publications