Measurement of ZZ production in pp collisions at sqrt(s)=7 TeV and limits on anomalous ZZZ and ZZgamma couplings with the ATLAS detector - Archive ouverte HAL Access content directly
Journal Articles Journal of High Energy Physics Year : 2013

Measurement of ZZ production in pp collisions at sqrt(s)=7 TeV and limits on anomalous ZZZ and ZZgamma couplings with the ATLAS detector

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G. Aad
Y. Coadou
E. Augé
M. Benoit
  • Function : Author
D. Rousseau
Zhiqing Zhang
  • Function : Author
  • PersonId : 829631
S. Calvet
Diane Cinca
N. Berger
C. Goy
T. Hryn'Ova
F. Vannucci
  • Function : Author

Abstract

A measurement of the ZZ production cross section in proton-proton collisions at sqrt(s) = 7 TeV using data recorded by the ATLAS experiment at the Large Hadron Collider is presented. In a data sample corresponding to an integrated luminosity of 4.6 fb-1 collected in 2011, events are selected that are consistent either with two Z bosons decaying to electrons or muons or with one Z boson decaying to electrons or muons and a second Z boson decaying to neutrinos. The ZZ*->llll and ZZ->llnunu cross sections are measured in restricted phase-space regions. These results are then used to derive the total cross section for ZZ events produced with both Z bosons in the mass range 66 to 116 GeV, sigmaZZtot = 6.7 +-0.7 +0.4-0.3 +-0.3 pb, which is consistent with the Standard Model prediction of 5.89+0.22-0.18 pb calculated at next-to-leading order in QCD. The normalized differential cross sections in bins of various kinematic variables are presented. Finally, the differential event yield as a function of the transverse momentum of the leading Z boson is used to set limits on anomalous neutral triple gauge boson couplings in ZZ production.

Dates and versions

in2p3-00757470 , version 1 (27-11-2012)

Identifiers

Cite

G. Aad, S. Aoun, C. P. Bee, C. Bertella, N. Bousson, et al.. Measurement of ZZ production in pp collisions at sqrt(s)=7 TeV and limits on anomalous ZZZ and ZZgamma couplings with the ATLAS detector. Journal of High Energy Physics, 2013, 3, pp.128. ⟨10.1007/JHEP03(2013)128⟩. ⟨in2p3-00757470⟩
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