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

CMS;Basegmez, Suzan;Beluffi, Camille;Bruno, Giacomo;Vizan Garcia, Jesús Manuel;et.al.
(2015) Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics — Vol. B740, p. 250-272 (2015)

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Authors
  • CMSUCLouvain
    Author
  • Basegmez, SuzanUCLouvain
    Author
  • Beluffi, CamilleUCLouvain
    Author
  • Bruno, GiacomoUCLouvain
    Author
  • Castello, RobertoUCLouvain
    Author
  • Caudron, AdrienUCLouvain
    Author
  • Ceard, LudivineUCLouvain
    Author
  • Da Silveira, Gustavo GilUCLouvain
    Author
  • Delaere, Christopheorcid-logoUCLouvain
    Author
  • Du Pree, TristanUCLouvain
    Author
  • Favart, DenisUCLouvain
    Author
  • Forthomme, LaurentUCLouvain
    Author
  • Giammanco, Andreaorcid-logoUCLouvain
    Author
  • Hollar, JonathanUCLouvain
    Author
  • Jez, PavelUCLouvain
    Author
  • Komm, MatthiasUCLouvain
    Author
  • Lemaitre, VincentUCLouvain
    Author
  • Liao, JunhuiUCLouvain
    Author
  • Nuttens, ClaudeUCLouvain
    Author
  • Pagano, DavideUCLouvain
    Author
  • Pin, ArnaudUCLouvain
    Author
  • Piotrzkowski, KrzysztofUCLouvain
    Author
  • Popov, AndreyUCLouvain
    Author
  • Quertenmont, LoïcUCLouvain
    Author
  • Selvaggi, MicheleUCLouvain
    Author
  • Vidal Maroño, MiguelUCLouvain
    Author
  • Vizan Garcia, Jesús ManuelUCLouvain
    Author
  • et. al.
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Abstract
A measurement of inclusive ZZ production cross section and constraints on anomalous triple gauge couplings in proton-proton collisions at sqrt(s) = 8 TeV are presented. A data sample, corresponding to an integrated luminosity of 19.6 inverse femtobarns was collected with the CMS experiment at the LHC. The measurements are performed in the leptonic decay modes ZZ to lll'l', where l = e, mu and l' = e, mu, tau. The measured total cross section, sigma(pp to ZZ) = 7.7 +/- 0.5 (stat.) +0.5-0.4 (syst.) +/- 0.4 (theo.) +/- 0.2 (lum.) pb for both Z bosons produced in the mass range 60 < m[Z] < 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 ZZ gamma couplings at the 95% confidence level: -0.004 < f[4,Z] < 0.004, -0.004 < f[5,Z] < 0.004, -0.005 < f[4,gamma] < 0.005, and -0.005 < f[5,gamma] < 0.005.
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CMS, Basegmez, S., Beluffi, C., Bruno, G., Castello, R., Caudron, A., Ceard, L., Da Silveira, G. G., Delaere, C., Du Pree, T., Favart, D., Forthomme, L., Giammanco, A., Hollar, J., Jez, P., Komm, M., Lemaitre, V., Liao, J., Nuttens, C., et al. (2015). Measurement of the pp to ZZ production cross section and constraints on anomalous triple gauge couplings in four-lepton final states at sqrt(s) = 8 TeV. Physics Letters. Section B: Nuclear, Elementary Particle and High-Energy Physics, B740, 250-272. https://doi.org/10.1016/j.physletb.2014.11.059 (Original work published 2015)