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Measurement of W ± Z production in proton-proton collisions at s√=7 TeV with the ATLAS detector

Research output: Contribution to Journal/Magazine › Journal article › peer-review

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Article number2173
<mark>Journal publication date</mark>10/2012
<mark>Journal</mark>European Physical Journal C: Particles and Fields
Issue number10
Volume72
Number of pages24
Publication StatusPublished
<mark>Original language</mark>English

Abstract

A study of W ± Z production in proton-proton collisions at s√=7 TeV is presented using data corresponding to an integrated luminosity of 4.6 fb−1 collected with the ATLAS detector at the Large Hadron Collider in 2011. In total, 317 candidates, with a background expectation of 68±10 events, are observed in double-leptonic decay final states with electrons, muons and missing transverse momentum. The total cross-section is determined to be σtotWZ=19.0+1.4−1.3(stat.)±0.9(syst.)±0.4(lumi.) pb , consistent with the Standard Model expectation of 17.6+1.1−1.0 pb . Limits on anomalous triple gauge boson couplings are derived using the transverse momentum spectrum of Z bosons in the selected events. The cross-section is also presented as a function of Z boson transverse momentum and diboson invariant mass.

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This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.