Measurement of the ZZ Production Cross Section and Limits on Anomalous Neutral Triple Gauge Couplings in Proton-Proton Collisions at root s=7 TeV with the ATLAS Detector
2012 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 108, no 4, 041804- p.Article in journal (Refereed) Published
A measurement of the ZZ production cross section in proton-proton collisions at root 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)(-0.3)(+0.4)(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 sigma(fid)(ZZ -> l+l-l+l-) = 19.4(-5.2)(+6.3)(stat)(-0.7)(+0.9)(syst) +/- 0.7(lumi) fb. The resulting total cross section for on-shell ZZ production, sigma(tot)(ZZ) = 8.5(-2.3)(+2.7)(stat)(-0.3)(+0.4)(syst) +/- 0.3(lumi) pb, is consistent with the standard model expectation of 6.5(-0.2)(+0.3) pb calculated at the next-to-leading order in QCD. Limits on anomalous neutral triple gauge boson couplings are derived.
Place, publisher, year, edition, pages
2012. Vol. 108, no 4, 041804- p.
IdentifiersURN: urn:nbn:se:uu:diva-171908DOI: 10.1103/PhysRevLett.108.041804ISI: 000299826400004OAI: oai:DiVA.org:uu-171908DiVA: diva2:512750
With 2984 more authors from the ATLAS Collaboration.2012-03-292012-03-292012-03-29Bibliographically approved