Measurement Of The Ww Production Cross Section In P(P)Over-Bar Collisions At Root(S)Over-Bar=1.96 Tev
VM M. Abazov,Brad K. Abbott,Maris A. Abolins, Bobby Samir Acharya,M. R. Adams, T. Adams,Mathieu Agelou, Jean Laurent Agram,Sunghwan Ahn, M. H. Ahsan,G. D. Alexeev, G. D. Alkhazov,Anrew Alton,George O. Alverson,Gelio A. Alves,M. Anastasoaie,Steven G H Anderson,Bernard Andrieu,Y. Arnoud, A. Askew,B. Å Åsman, O. V. Atramentov,Christian Autermann,C. Ávila,Frédérique Badaud,Andrew R. Baden,Boris Yu Baldin,P. W. Balm,Sw W. Banerjee,Emanuela Barbëris,P. Bargassa,Philip S. Baringer,Chris P. Barnes,J. L. Barreto,J. F. Bartlett,Ursula Bassler,Daniela A. Bauer,Alice Bean,Stéphanie Beauceron,Michael Begel,Angela Bellavance,Suman B. Beri,Gregorio Bernardi,Ralf P. Bernhard,Iain A. Bertram,Marc Besançon,R. Beuselinck,V. A. Bezzubov,Priya C. Bhat,V. Bhatnagar,M. Binder,Kevin M. Black,I. Blackler,Gerald C. Blazey,Freya Blekman,Susan K. Blessing,D. Bloch,Ulla Blumenschein,Amber Boehnlein,Oana E Vickey Boeriu,Tim A. Bolton,Fred O. Borcherding,Guennadi Borissov, K. Bos,Tulika Bose,Achi E. Brandt,Raymond J. Brock,Gustaaf Brooijmans,Alan D. Bross,Norm J. Buchanan,Donald Bruce Buchholz,Marc Buehler,V. Buescher,Sergey Burdin,T. H. Burnett,E. Busato,John M. Butler,J. Bystrický,Washington R. Carvalho,Brendan C K Casey,Neal M. Cason,H. Castilla-Valdez,Subhendu K. Chakrabarti,Dhiman Chakraborty,Kai M A Chan,Avdhesh Chandra,Doug Chapin,François Charles,Elliott Cheu,Laurent Chevalier,D. K. Cho,Soojeong Choi,Tim Christiansen,Leonard Christofek,Dan R. Claes,B. C. Clément,Christophe Clément,Yann C. Coadou,Michael Cooke,W. E. Cooper,D. Coppage,Marjorie D. Corcoran,J. Coss,A. Cothenet,M. C. Cousinou, S. Crépé-Renaudin,M. Cristetiu,Mary Anne Clare Cummings,David Ćutts,H. Da Motta,Bill Davies, Gavin J. Davies,G. A. Davis,Kaushik De,Paul De Jong,Sijbrand J. De Jong,Eduard De La De La Cruz-Burelo,C. de Oliveria Martins, S. Dean,Frédéric Déliot,Pierre Antoine Delsart,Marcel Demarteau,Regina F. Démina,Pavel Démine,D. S. Denisov,Sergey P. Denisov,Satish V. Desai,H. Thomas Diehl, M. Diesburg,M. Doidge,Huan Dong,S. Doulas, L. Duflot,Shashikant R. Dugad,Arnaud Duperrin,Justin S. Dyer,Alexander S. Dyshkant,Michael Eads,Daniel L. Edmunds,Tom J. Edwards,John A. Ellison,Johannes Elmsheuser,J. T. Eltzroth,V. Daniel Elvira,Sarah C. Eno,P. F. Ermolov.,O. V. Eroshin,Juan Cruz Estrada,David E. Evans,Harold G. Evans,A. V. Evdokimov,V. N. Evdokimov,James E. Fast,S. N. Fatakia,Lorenzo Feligioni, T. Ferbel,Frank Fiedler,Frank Filthaut,Wade C. Fisher,H. Eugene Fisk, Michael R. Fortner,Howard S. Fox,W. S. Freeman,Shaohua Fu,Stuart Fuess,Thomas Gadfort,Cristina F. Galea,Elizabeth J. Gallas,E. Galyaev,Carmen José García,Arán García-Bellido,Jason A. Gardner,V. B. Gavrilov,Pascal Gay,Denis Gelé,R. Gelhaus,Krzysztof Genser,Cecilia E. Gerber,Yu S. Gershtein,G. Ginther,Tobias Golling,B. Gómez,Krishnaswamy N. Gounder,A. G. Goussiou,Paul D. Grannis,S. Greder,Herbert B. Greenlee,Zeno Dixon Greenwood,E. De Moraes Gregores,Ph L Y Gris,Jean François Grivaz,Leslie S. 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PHYSICAL REVIEW LETTERS（2005）
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摘要
We present a measurement of the W boson pair-production cross section in p(p) over bar collisions at a center-of-mass energy of root s=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, e mu, or mu mu). 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(-3.8)(+4.3)(stat)(-0.9)(+1.2)(syst)+/- 0.9(lum) pb, in agreement with predictions from the standard model.
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