Measurement of the ZZ production cross section and limits on anomalous neutral triple gauge couplings in proton-proton collisions at √s = 7 TeV with the ATLAS detector
Files
(Published version)
Date
2012
Authors
Aad, G.
ATLAS Collaboration,
Editors
Advisors
Journal Title
Journal ISSN
Volume Title
Type:
Journal article
Citation
Physical Review Letters, 2012; 108(4):041804-1-041804-18
Statement of Responsibility
G. Aad ... P. Jackson ... L. Lee ... A. Petridis ... N. Soni ... M. J. White ... et al. (ATLAS Collaboration)
Conference Name
Abstract
A measurement of the ZZ production cross section in proton-proton collisions at s√=7 TeV using data corresponding to an integrated luminosity of 1.02 fb⁻¹ recorded by the ATLAS experiment at the LHC is presented. Twelve events containing two Z boson candidates decaying to electrons and/or muons are observed, with an expected background of 0.3±0.3(stat)+0.4−0.3(syst) events. The cross section measured in a phase-space region with good detector acceptance and for dilepton masses within the range 66 to 116 GeV is σfidZZ→ℓ⁺ℓ⁻ℓ⁺ℓ⁻=19.4+6.3−5.2(stat)+0.9−0.7(syst)±0.7(lumi) fb. The resulting total cross section for on-shell ZZ production, σtotZZ=8.5+2.7−2.3(stat)+0.4−0.3(syst)±0.3(lumi) pb, is consistent with the standard model expectation of 6.5+0.3−0.2 pb calculated at the next-to-leading order in QCD. Limits on anomalous neutral triple gauge boson couplings are derived.
School/Discipline
Dissertation Note
Provenance
Description
Access Status
Rights
© 2012 CERN, for the ATLAS Collaboration. Published by the American Physical Society under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.