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

Khachatryan, V ; Sharif University of Technology | 2015

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  1. Type of Document: Article
  2. DOI: 10.1016/j.physletb.2014.11.059
  3. Publisher: Elsevier , 2015
  4. Abstract:
  5. 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
  6. Keywords:
  7. CMS ; Electroweak ; Physics
  8. Source: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics ; Volume 740 , January , 2015 , Pages 250-272 ; 03702693 (ISSN)
  9. URL: http://www.sciencedirect.com/science/article/pii/S0370269314008697