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Measurement of the W+W- cross section in √s = 7 TeV pp collisions with ATLAS

By G. Aad, [Unknown] et al., S. Bentvelsen, A.P. Colijn, P. de Jong, L. de Nooij, A.D. Doxiadis, P. Ferrari, H. Garitaonandia, D.A.A. Geerts, M. Gosselink, M.S. Kayl, E. Koffeman, H. Lee, F. Linde, J. Mechnich, I. Mussche, J.P. Ottersbach, M. Tsiakiris, E. van der Kraaij, R. van der Leeuw, Z. van Kesteren, I.B. van Vulpen, J.C. Vermeulen and M. Vreeswijk


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

Year: 2011
DOI identifier: 10.1103/physrevlett.107.041802
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Provided by: NARCIS
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