Combination of tt¯ cross section measurements and constraints on the mass of the top quark and its decays into charged Higgs bosons

V. M. Abazov, B. Abbott, M. Abolins,B. S. Acharya,M. Adams, T. Adams, E. Aguilo, M. Ahsan,G. D. Alexeev, G. Alkhazov,A. Alton,G. Alverson, G. A. Alves, L. S. Ancu, T. Andeen,M. S. Anzelc,M. Aoki,Y. Arnoud,M. Arov,M. Arthaud, A. Askew, B. Åsman, O. Atramentov,C. Avila,J. BackusMayes,F. Badaud,L. Bagby, B. Baldin,D. Bandurin, S. Banerjee,E. Barberis,A.-F. Barfuss,P. Bargassa, P. Baringer,J. Barreto,J. Bartlett, U. Bassler,D. Bauer,S. Beale,A. Bean, M. Begalli,M. Begel,C. Belanger-Champagne, L. Bellantoni,A. Bellavance,J. Benitez,S. Beri,G. Bernardi, R. Bernhard,I. Bertram,M. Besançon,R. Beuselinck,V. Bhatnagar,P. Bhat,V. Bhatnagar,G. Blazey, S. Blessing,K. Bloom,A. Boehnlein,D. Boline,T. Bolton, E. Boos, G. Borissov,T. Bose,A. Brandt,R. Brock,G. Brooijmans, A. Bross, D. Brown,X. Bu, D. Buchholz,M. Buehler,V. Buescher,V. Bunichev, S. Burdin,T. Burnett,C. Buszello, P. Calfayan,B. Calpas, S. Calvet,J. Cammin, M. Carrasco-Lizarraga,E. Carrera,W. Carvalho,B. Casey,H. Castilla-Valdez, S. Chakrabarti, D. Chakraborty,K. Chan,A. Chandra, E. Cheu,S. Chevalier-Théry,D. Cho,S. Choi,B. Choudhary,T. Christoudias, S. Cihangir,D. Claes,J. Clutter,M.-C. Cousinou,W. Cooper, M. Corcoran, F. Couderc,M.-C. Cousinou,S. Crépé-Renaudin,V. Cuplov, D. Cutts, M. Ćwiok,A. Das,G. Davies, K. De, S. de Jong,E. De La Cruz-Burelo,K. DeVaughan, F. Déliot, M. Demarteau,R. Demina,D. Denisov,S. Denisov,S. Desai, H. Diehl, M. Diesburg,A. Dominguez, T. Dorland,A. Dubey,L. Dudko, L. Duflot, D. Duggan,A. Duperrin,S. Dutt,A. Dyshkant, M. Eads, D. Edmunds, J. Ellison,V. Elvira, Y. Enari, S. Eno,P. Ermolov, M. Escalier,H. Evans,A. Evdokimov,V. Evdokimov,G. Facini,A. Ferapontov, T. Ferbel,F. Fiedler, F. Filthaut, W. Fisher, H. Fisk, M. Fortner,H. Fox,S. Fu,S. Fuess, T. Gadfort,C. Galea, A. Garcia-Bellido, V. Gavrilov, P. Gay,W. Geist,W. Geng, C. Gerber, Y. Gershtein, D. Gillberg,G. Ginther,B. Gómez, A. Goussiou,P. Grannis,S. Greder, H. Greenlee,Z. Greenwood,E. Gregores,G. Grenier, Ph. Gris, J.-F. 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Pol,P. Polozov,A. Popov,C. Potter,W. Prado da Silva, S. Protopopescu, J. Qian, A. Quadt,B. Quinn,A. Rakitine,M. Rangel, K. Ranjan, P. Ratoff, P. Renkel,P. Rich, M. Rijssenbeek, I. Ripp-Baudot, F. Rizatdinova, S. Robinson,R. Rodrigues,M. Rominsky,C. Royon, P. Rubinov, R. Ruchti, G. Safronov, G. Sajot,A. Sánchez-Hernández,M. Sanders,B. Sanghi, G. Savage,L. Sawyer,T. Scanlon, D. Schaile,R. Schamberger,Y. Scheglov, H. Schellman,T. Schliephake,S. Schlobohm, C. Schwanenberger, R. Schwienhorst,J. Sekaric, H. Severini, E. Shabalina, M. Shamim,V. Shary,A. Shchukin,R. Shivpuri,V. Siccardi, V. Simak,V. Sirotenko, P. Skubic, P. Slattery,D. Smirnov, G. Snow, J. Snow,S. Snyder, S. Söldner-Rembold, L. Sonnenschein, A. Sopczak, M. Sosebee,K. Soustruznik, B. Spurlock,J. Stark, V. Stolin, D. Stoyanova, J. Strandberg, S. Strandberg,M. Strang, E. Strauss, M. Strauss,R. Ströhmer, D. Strom,L. Stutte, S. Sumowidagdo,P. Svoisky,M. Takahashi, A. Tanasijczuk,W. Taylor, B. Tiller,F. Tissandier,M. Titov,V. 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PHYSICAL REVIEW D（2009）

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摘要

We combine measurements of the top quark pair production cross section in p (p) over bar collisions in the l + jets, ll, and tau l final states ( where l is an electron or muon) at a center of mass energy of root s = 1.96 TeV in 1 fb(-1) of data collected with the D0 detector. For a top quark mass of 170 GeV/c(2), we obtain sigma(t (t) over bar) = 8.18(-0.87)(+0.98) pb in agreement with the theoretical prediction. Based on predictions from higher order quantum chromodynamics, we extract a mass for the top quark from the combined t (t) over bar cross section, consistent with the world average of the top quark mass. In addition, the ratios of t (t) over bar cross sections in different final states are used to set upper limits on the branching fractions B(t -> H(+)b -> tau(+) vb) and B(t -> H(+)b -> c (s) over barb) as a function of the charged Higgs boson mass.

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