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# Measurement of the W+W- cross section in sqrt(s) = 7 TeV pp collisions with ATLAS

6 Laboratoire de Physique Corpusculaire
LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
9 APC - Neutrinos
LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies, APC (UMR_7164) - AstroParticule et Cosmologie
Abstract : This Letter presents a measurement of the $\WW$ production cross section in $\sqrt{s} = 7 \TeV\ pp$ collisions by the ATLAS experiment, using 34 $\pbi$ of integrated luminosity produced by the Large Hadron Collider at CERN. Selecting events with two isolated leptons, each either an electron or a muon, 8 candidate events are observed with an expected background of $1.7\pm0.6$ events. The measured cross section is $41^{+20}_{-16}(\mathrm{stat.})\pm 5(\mathrm{syst.})\pm 1(\mathrm{lumi.})$ pb, which is consistent with the standard model prediction of $44 \pm 3$ pb calculated at next-to-leading order in QCD.
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Journal articles
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http://hal.in2p3.fr/in2p3-00589233
Contributor : Emmanuelle Vernay <>
Submitted on : Thursday, April 28, 2011 - 10:36:16 AM
Last modification on : Sunday, June 20, 2021 - 3:35:04 AM

### Citation

G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Measurement of the W+W- cross section in sqrt(s) = 7 TeV pp collisions with ATLAS. Physical Review Letters, American Physical Society, 2011, 107, pp.041802. ⟨10.1103/PhysRevLett.107.041802⟩. ⟨in2p3-00589233⟩

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