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## Measurement of the WW production cross section in $p\overline{p}$ collisions at $\sqrt{s}$ = 1.96 TeV

### Abstract

D0We present a measurement of the W boson pair-production cross section in p anti-p collisions at a center-of-mass energy of sqrt{s}=1.96 TeV. The data, collected with the Run II DO detector, correspond to an integrated luminosity of 224-252 pb^-1 depending on the final state (ee, emu or mumu). We observe 25 candidates with a background expectation of 8.1+/-0.6(stat)+/-0.6(syst)+/-0.5(lum) events. The probability for an upward fluctuation of the background to produce the observed signal is 2.3x10^-7, equivalent to 5.2 standard deviations.The measurement yields a cross section of 13.8+4.3/-3.8(stat)+1.2/-0.9(syst)+/-0.9(lum) pb, in agreement with predictions from the standard model

Topics: intermediate boson decay, intermediate boson production, standard model, proton-proton inclusive interactions, W bosons, high-energy elementary particle interactions, 13.38.Be, 13.85.Qk, 14.70.Fm, [PHYS.HEXP] Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: American Physical Society
Year: 2005
DOI identifier: 10.1103/PhysRevLett.94.151801
OAI identifier: oai:HAL:in2p3-00023268v1
Provided by: Hal-Diderot
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