Precision measurement of the top-quark mass from dilepton events at CDF II
A. Abulencia,J. Adelman,T. Akimoto,M. G. Albrow,D. Ambrose,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. E. Barnes,S. Baroiant,V. Bartsch,G. Bauer,F. Bedeschi,S. Behari,S. Belforte,G. Bellettini,J. Bellinger,A. Belloni,D. Benjamin,A. Beretvas,J. Beringer,A. Bhatti,M. Binkley,D. Bisello,C. Blocker,B. Blumenfeld,A. Bocci,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. S. Budd,S. Budd,S. Budroni,K. Burkett,P. Bussey,K. L. Byrum,S. Cabrerao,M. Campanelli,M. Campbell,F. Canelli,A. Canepa, D. Carlsmith,R. Carosi,S. Carron,M. Casarsa,A. Castro,P. Catastini,D. Cauz,M. Cavalli-Sforza,A. Cerri,S. H. Chang,Y. C. Chen,M. Chertok,G. Chiarelli,G. Chlachidze,F. Chlebana,K. Cho,D. Chokheli,G. Choudalakis,S. H. Chuang,K. Chung,W. H. Chung,Y. S. Chung,M. Ciljak,C. I. Ciobanu,M. A. Ciocci,A. Clark,D. Clark,M. Coca,G. Compostella,M. E. Convery,J. Conway,B. Cooper,K. Copic,M. Cordelli,G. Cortiana,F. Crescioli,J. Cuevasl,R. Culbertson,J. C. Cully,D. Cyr,S. DaRonco,M. Datta,T. Davies,M. D'Onofrio,D. Dagenhart,F. Crescioli,C. Almenar,J. Cuevas,R. Culbertson,J. Cully,D. Cyr,S. DaRonco,M. Datta,S. D’Auria,T. Davies,M. D’Onofrio,D. Dagenhart,P. de Barbaro,S. Cecco,A. Deisher,G. Lentdecker,M. Dell’Orso,F. Paoli,L. Demortier,J. Deng,M. Deninno,D. Pedis,P. Derwent,G. Giovanni,C. Dionisi,B. Ruzza,J. Dittmann,P. DiTuro,C. Dörr,S. Donati,M. Donega,P. Dong,J. Donini,T. Dorigo,S. Dube,J. Efron,R. Erbacher,D. Errede,S. Errede,R. Eusebi,H. Fang,S. Farrington,I. Fedorko,W. Fedorko,R. Feild,M. Feindt,J. Fernandez,R. Field,G. Flanagan,A. Foland,S. Forrester,G. Foster,M. Franklin,J. Freeman,I. Furic,M. Gallinaro,J. Galyardt,J. Garcia,F. Garberson,A. Garfinkel,C. Gay,H. Gerberich,D. Gerdes,S. Giagu,P. Giannetti,A. Gibson,K. Gibson,J. Gimmell,C. 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PHYSICAL REVIEW D（2007）
Cited 36|Views243
Abstract
We report a measurement of the top-quark mass, M-t, in the dilepton decay channel of tt -> bl'(+) v(l')bl(l)(-v) using an integrated luminosity of 1.0 fb(-1) of pp collisions collected with the CDF II detector. We apply a method that convolutes a leading-order matrix element with detector resolution functions to form event-by-event likelihoods; we have enhanced the leading-order description to describe the effects of initial-state radiation. The joint likelihood is the product of the likelihoods from 78 candidate events in this sample, which yields a measurement of M-t = 164.5 +/- 3.9 (stat.) +/- 3.9 (syst.) GeV/c(2), the most precise measurement of Mt in the dilepton channel.
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Key words
elementary particles,particle acceleration,top quark,decay,luminosity,accuracy,particle accelerators,resolution
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