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Measurement of the WW production cross section in pp collisions at square root[s]=1.96 TeV |
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| Authors: | Abazov V M Abbott B Abolins M Acharya B S Adams M Adams T Agelou M Agram J-L Ahn S H Ahsan M Alexeev G D Alkhazov G Alton A Alverson G Alves G A Anastasoaie M Anderson S Andrieu B Arnoud Y Askew A Asman B Atramentov O Autermann C Avila C Badaud F Baden A Baldin B Balm P W Banerjee S Barberis E Bargassa P Baringer P Barnes C Barreto J Bartlett J F Bassler U Bauer D Bean A Beauceron S Begel M Bellavance A Beri S B Bernardi G Bernhard R Bertram I Besançon M Beuselinck R Bezzubov V A Bhat P C Bhatnagar V Binder M Black K M Blackler I Blazey G Blekman F Blessing S Bloch D Blumenschein U |
| Institution: | Joint Institute for Nuclear Research, Dubna, Russia. |
| Abstract: | We present a measurement of the W boson pair-production cross section in pp collisions at a center-of-mass energy of sqrts]=1.96 TeV. The data, collected with the Run II D0 detector at Fermilab, 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. |
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