Cross section measurements of high-pT dilepton final-state processes using a global fitting method
A. Abulencia,J. Adelman,T. Affolder,T. Akimoto, M. G. Albrow,D. Ambrose,S. Amerio, D. Amidei, A. Anastassov,K. Anikeev, A. Annovi, J. Antos,M. Aoki, G. Apollinari,J.-F. Arguin,T. Arisawa,A. Artikov,W. Ashmanskas,A. Attal, F. Azfar,P. Azzi-Bacchetta, P. Azzurri,N. Bacchetta,W. Badgett, A. Barbaro-Galtieri,V. Barnes,B. Barnett,S. Baroiant,V. Bartsch,G. Bauer, F. Bedeschi,S. Behari, S. Belforte, G. Bellettini, J. Bellinger, A. Beretvas,D. Benjamin, A. Beretvas,J. Beringer, T. Berry,A. Bhatti,M. Binkley, D. Bisello,R. Blair,C. Blocker, B. Blumenfeld,A. Bolshov,A. Bodek, V. Boisvert, G. Bolla,A. Bolshov,D. Bortoletto,J. Boudreau, A. Boveia, B. Brau, L. Brigliadori,C. Bromberg,E. Brubaker, J. Budagov,H. Budd,S. Budd,S. Budroni, K. Burkett,G. Busetto, P. Bussey,K. Byrum,S. Cabrera,M. Campanelli, M. Campbell,F. Canelli, A. Canepa,S. Carillo,D. Carlsmith,R. Carosi,S. Carron,M. Cavalli-Sforza,A. Castro,P. Catastini, D. Cauz,M. Cavalli-Sforza,A. Cerri, L. Cerrito,S. Chang,Y. Chen, M. Chertok, G. 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PHYSICAL REVIEW D（2008）
引用 30|浏览274
摘要
We present a new method for studying high-p(T) dilepton events (e(+/-)e(-/+), mu(+/-)mu(-/+), e(+/-)mu(-/+)) and simultaneously extracting the production cross sections of p (p) over bar -> t (t) over bar, p (p) over bar -> W+W-, and p (p) over bar -> Z(0) -> tau(+)tau(-) at a center-of-mass energy of root s = 1.96 TeV. We perform a likelihood fit to the dilepton data in a parameter space defined by the missing transverse energy and the number of jets in the event. Our results, which use 360 pb(-1) of data recorded with the CDF II detector at the Fermilab Tevatron Collider, are sigma(t (t) over bar) = 8.5(-2.2)(+2.7) pb, sigma(W+W-) = 16.3(-4.4)(+5.2) pb, and sigma(Z(0) -> tau(+)tau(-)) = 291(-46)(+50) pb.
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关键词
particle acceleration,center of mass,elementary particles,parameter space,cross section
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