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Measurement of $W\gamma$ and $Z\gamma$ Production in Proton-Proton Collisions at $\sqrt{s}=7$ TeV with the ATLAS Detector
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics.
Stockholm University, Faculty of Science, Department of Physics. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). (Elementarpartikelfysik)
Stockholm University, Faculty of Science, Department of Physics. (Systemfysik)
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2011 (English)In: Journal of High Energy Physics (JHEP), ISSN 1126-6708, E-ISSN 1029-8479, Vol. 09, 072- p.Article in journal (Refereed) Published
Abstract [en]

We present studies of W and Z bosons with associated high energy photons produced in pp collisions at root s = 7 TeV. The analysis uses 35 pb(-1) of data collected by the ATLAS experiment in 2010. The event selection requires W and Z bosons decaying into high pT leptons (electrons or muons) and a photon with E(T) > 15 GeV separated from the lepton(s) by a distance Delta R(l, gamma) > 0.7 in eta-phi space. A total of 95 (97) pp -> e(+/-)nu gamma + X (pp -> mu(+/-)nu gamma + X) and 25 (23) pp -> e(+)e(-)gamma + X (pp -> mu(+)mu(-)gamma + X) event candidates are selected. The kinematic distributions of the leptons and photons and the production cross sections are measured. The data are found to agree with Standard Model predictions that include next-to-leading-order O(alpha alpha(s)) contributions.

Place, publisher, year, edition, pages
2011. Vol. 09, 072- p.
National Category
Subatomic Physics
Research subject
Physics
Identifiers
URN: urn:nbn:se:su:diva-63100DOI: 10.1007/JHEP09(2011)072ISI: 000296087000001OAI: oai:DiVA.org:su-63100DiVA: diva2:446687
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Atlas
Funder
Swedish Research CouncilKnut and Alice Wallenberg Foundation
Note
authorCount :3046Available from: 2011-10-09 Created: 2011-10-09 Last updated: 2017-12-08Bibliographically approved

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Publisher's full texthttp://dx.doi.org/10.1007/JHEP09(2011)072

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Åsman, BarbroBohm, ChristianClément, ChristopheEriksson, DanielGellerstedt, KarlHellman, StenHidvegi, AttilaHolmgren, Sven-OlofJohansson, ErikJon-And, KerstinLundberg, JohanMilstead, DavidMoa, TorbjörnNordkvist, BjörnOhm, ChristianPapadelis, ArasSilverstein, SamuelSjölin, JörgenStrandberg, SaraTylmad, MajaYang, Zhaoyu
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Department of PhysicsThe Oskar Klein Centre for Cosmo Particle Physics (OKC)
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