Measurement of the W+W- cross section in √s=7 TeV pp collisions with ATLAS
ATLAS Collaboration (Including: Farrington, Sinead). (2011) Measurement of the W+W- cross section in √s=7 TeV pp collisions with ATLAS. Physical Review Letters, Vol.107 (No.4). 041802. ISSN 0031-9007
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Official URL: http://dx.doi.org/10.1103/PhysRevLett.107.041802
This Letter presents a measurement of the W+W- production cross section in √s=7 TeV pp collisions by the ATLAS experiment, using 34 pb-1 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±0.6 events. The measured cross section is 41-16+20(stat)±5(syst)±1(lumi) pb, which is consistent with the standard model prediction of 44±3 pb calculated at next-to-leading order in QCD.
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