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This Letter reports a measurement of the WW production cross section insqrt(s) = 7 TeV pp collisions using data corresponding to an integratedluminosity of 1.02/fb collected with the ATLAS detector. Using leptonic decaysof oppositely charged W bosons, the total measured cross section is sigma(pp ->WW) = 54.4 +/- 4.0 (stat.) +/- 3.9 (syst.) +/- 2.0 (lumi.) pb, consistent withthe Standard Model prediction of sigma(pp -> WW) = 44.4 +/- 2.8 pb. Limits onanomalous electroweak triple-gauge couplings are extracted from a fit to thetransverse-momentum distribution of the leading charged lepton in the event.

Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with the ATLAS detector and limits on anomalous gauge couplings