Measurement of the pp to ZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at √s = 8 TeV
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 19.6fb -1, collected with the CMS experiment at the LHC. The measurements are performed in the leptonic decay modes ZZ→ℓℓℓ ' ℓ ', where ℓ = e, μ and ℓ ' = e, μ, τ. The measured total cross section σ(pp→ZZ)=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. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000094199Publication status
publishedExternal links
Journal / series
Physics Letters BVolume
Pages / Article No.
Publisher
ElsevierSubject
CMS; Physics; ElectroweakOrganisational unit
03381 - Pauss, Felicitas (emeritus)
03593 - Dissertori, Günther / Dissertori, Günther
03904 - Wallny, Rainer / Wallny, Rainer
08803 - Grab, Christoph (Tit.Prof.)
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