Elsevier

Physics Letters B

Volume 740, 5 January 2015, Pages 250-272
Physics Letters B

Measurement of the ppZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at s=8 TeV

https://doi.org/10.1016/j.physletb.2014.11.059Get rights and content
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Abstract

A measurement of the inclusive ZZ production cross section and constraints on anomalous triple gauge couplings in proton–proton collisions at s=8 TeV are presented. The analysis is based on a data sample, corresponding to an integrated luminosity of 19.6 fb1, collected with the CMS experiment at the LHC. The measurements are performed in the leptonic decay modes ZZ, where =e,μ and =e,μ,τ. The measured total cross section σ(ppZZ)=7.7±0.5 (stat)0.4+0.5 (syst)±0.4(theo)±0.2 (lumi) pb, for both Z bosons produced in the mass range 60<mZ<120 GeV, is consistent with standard model predictions. Differential cross sections are measured and well described by the theoretical predictions. The invariant mass distribution of the four-lepton system is used to set limits on anomalous ZZZ and ZZγ couplings at the 95% confidence level: 0.004<f4Z<0.004, 0.004<f5Z<0.004, 0.005<f4γ<0.005, and 0.005<f5γ<0.005.

Keywords

CMS
Physics
Electroweak

Cited by (0)

1

Also at Vienna University of Technology, Vienna, Austria.

2

Also at CERN, European Organization for Nuclear Research, Geneva, Switzerland.

E-mail address: [email protected].