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
- Function : Author
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- IdHAL : georges-aad
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Y. Coadou
- Function : Author
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- IdHAL : yann-coadou
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E. Augé
- Function : Author
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- IdHAL : etienne-auge
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M. Benoit
- Function : Author
J.B. de Vivie de Regie
- Function : Author
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- IdHAL : jean-baptiste-de-vivie
- ORCID : 0000-0001-9163-2211
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S. Henrot-Versillé
- Function : Author
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- IdHAL : sophie-henrot-versille
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D. Rousseau
- Function : Author
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- IdHAL : david-rousseau
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D. Calvet
- Function : Author
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- IdHAL : david-calvet
- ORCID : 0000-0002-9953-5333
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Reina Coromoto Camacho Toro
- Function : Author
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- IdHAL : reina-camacho-toro
- ORCID : 0000-0002-9192-8028
- IdRef : 168138077
Diane Cinca
- Function : Author
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Daniela Paredes Hernández
- Function : Author
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S. Crépé-Renaudin
- Function : Author
- PersonId : 742348
- IdHAL : sabine-crepe
- ORCID : 0000-0001-5980-5805
- IdRef : 118947249
M.H. Genest
- Function : Author
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- IdHAL : marie-helene-genest
- ORCID : 0000-0002-4098-2024
- IdRef : 191694142
F. Malek
- Function : Author
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- IdHAL : fairouz-malek
- ORCID : 0000-0002-0948-5775
- IdRef : 084171219
N. Berger
- Function : Author
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- IdHAL : nicolas-berger
C. Goy
- Function : Author
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- IdHAL : goycorinne
- ORCID : 0000-0002-1297-8925
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T. Hryn'Ova
- Function : Author
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- IdHAL : thrynova
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S. Jézéquel
- Function : Author
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- IdHAL : stephane-jezequel
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- IdRef : 074440926
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.