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arxiv 1009.5686 v1 pith:F4GK5UTN submitted 2010-09-28 hep-ex

Determination of the width of the top quark

V.M. Abazov , B. Abbott , M. Abolins , B.S. Acharya , M. Adams , T. Adams , G.D. Alexeev , G. Alkhazov
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A. Altona G. Alverson G.A. Alves L.S. Ancu M. Aoki Y. Arnoud M. Arov A. Askew B. {\AA}sman O. Atramentov C. Avila J. BackusMayes F. Badaud L. Bagby B. Baldin D.V. Bandurin S. Banerjee E. Barberis P. Baringer J. Barreto J.F. Bartlett U. Bassler V. Bazterra S. Beale A. Bean M. Begalli M. Begel C. Belanger-Champagne L. Bellantoni S.B. Beri G. Bernardi R. Bernhard I. Bertram M. Besan\c{c}on R. Beuselinck V.A. Bezzubov P.C. Bhat V. Bhatnagar G. Blazey S. Blessing K. Bloom A. Boehnlein D. Boline T.A. Bolton E.E. Boos G. Borissov T. Bose A. Brandt O. Brandt R. Brock G. Brooijmans A. Bross D. Brown J. Brown X.B. Bu D. Buchholz M. Buehler V. Buescher V. Bunichev S. Burdinb T.H. Burnett C.P. Buszello B. Calpas E. Camacho-P\'erez M.A. Carrasco-Lizarraga B.C.K. Casey H. Castilla-Valdez S. Chakrabarti D. Chakraborty K.M. Chan A. Chandra G. Chen S. Chevalier-Th\'ery D.K. Cho S.W. Cho S. Choi B. Choudhary T. Christoudias S. Cihangir D. Claes J. Clutter M. Cooke W.E. Cooper M. Corcoran F. Couderc M.-C. Cousinou A. Croc D. Cutts M. \'Cwiok A. Das G. Davies K. De S.J. de Jong E. De La Cruz-Burelo F. D\'eliot M. Demarteau R. Demina D. Denisov S.P. Denisov S. Desai K. DeVaughan H.T. Diehl M. Diesburg A. Dominguez T. Dorland A. Dubey L.V. Dudko D. Duggan A. Duperrin S. Dutt A. Dyshkant M. Eads D. Edmunds J. Ellison V.D. Elvira Y. Enari S. Eno H. Evans A. Evdokimov V.N. Evdokimov G. Facini T. Ferbel F. Fiedler F. Filthaut W. Fisher H.E. Fisk M. Fortner H. Fox S. Fuess T. Gadfort A. Garcia-Bellido V. Gavrilov P. Gay W. Geist W. Geng D. Gerbaudo C.E. Gerber Y. Gershtein G. Ginther G. Golovanov A. Goussiou P.D. Grannis S. Greder H. Greenlee Z.D. Greenwood E.M. Gregores G. Grenier Ph. Gris J.-F. Grivaz A. Grohsjean S. Gr\"nendahl M.W. Gr\"unewald F. Guo J. Guo G. Gutierrez P. Gutierrez A. Haasc S. Hagopian J. Haley L. Han K. Harder A. Harel J.M. Hauptman J. Hays T. Head T. Hebbeker D. Hedin H. Hegab A.P. Heinson U. Heintz C. Hensel I. Heredia-De La Cruz K. Herner G. Hesketh M.D. Hildreth R. Hirosky T. Hoang J.D. Hobbs B. Hoeneisen M. Hohlfeld S. Hossain Z. Hubacek N. Huske V. Hynek I. Iashvili R. Illingworth A.S. Ito S. Jabeen M. Jaffr\'e S. Jain D. Jamin R. Jesik K. Johns M. Johnson D. Johnston A. Jonckheere P. Jonsson J. Joshi A. Justed K. Kaadze E. Kajfasz D. Karmanov P.A. Kasper I. Katsanos R. Kehoe S. Kermiche N. Khalatyan A. Khanov A. Kharchilava Y.N. Kharzheev D. Khatidze M.H. Kirby J.M. Kohli A.V. Kozelov J. Kraus A. Kumar A. Kupco T. Kur\v{c}a V.A. Kuzmin J. Kvita S. Lammers G. Landsberg P. Lebrun H.S. Lee S.W. Lee W.M. Lee J. Lellouch L. Li Q.Z. Li S.M. Lietti J.K. Lim D. Lincoln J. Linnemann V.V. Lipaev R. Lipton Y. Liu Z. Liu A. Lobodenko M. Lokajicek P. Love H.J. Lubatti R. Luna-Garciae A.L. Lyon A.K.A. Maciel D. Mackin R. Madar R. Maga\~na-Villalba S. Malik V.L. Malyshev Y. Maravin J. Mart\'inez-Ortega R. McCarthy C.L. McGivern M.M. Meijer A. Melnitchouk D. Menezes P.G. Mercadante M. Merkin A. Meyer J. Meyer N.K. Mondal G.S. Muanza M. Mulhearn E. Nagy M. Naimuddin M. Narain R. Nayyar H.A. Neal J.P. Negret P. Neustroev S.F. Novaes T. Nunnemann G. Obrant J. Orduna N. Osman J. Osta G.J. Otero y Garz\'on M. Owen M. Padilla M. Pangilinan N. Parashar V. Parihar S.K. Park J. Parsons R. Partridgec N. Parua A. Patwa B. Penning M. Perfilov K. Peters Y. Peters G. Petrillo P. P\'etroff R. Piegaia J. Piper M.-A. Pleier P.L.M. Podesta-Lermaf V.M. Podstavkov M.-E. Pol P. Polozov A.V. Popov M. Prewitt D. Price S. Protopopescu J. Qian A. Quadt B. Quinn M.S. Rangel K. Ranjan P.N. Ratoff I. Razumov P. Renkel P. Rich M. Rijssenbeek I. Ripp-Baudot F. Rizatdinova M. Rominsky C. Royon P. Rubinov R. Ruchti G. Safronov G. Sajot A. S\'anchez-Hern\'andez M.P. Sanders B. Sanghi A.S. Santos G. Savage L. Sawyer T. Scanlon R.D. Schamberger Y. Scheglov H. Schellman T. Schliephake S. Schlobohm C. Schwanenberger R. Schwienhorst J. Sekaric H. Severini E. Shabalina V. Shary A.A. Shchukin R.K. Shivpuri V. Simak V. Sirotenko P. Skubic P. Slattery D. Smirnov K.J. Smith G.R. Snow J. Snow S. Snyder S. S\"oldner-Rembold L. Sonnenschein A. Sopczak M. Sosebee K. Soustruznik B. Spurlock J. Stark V. Stolin D.A. Stoyanova E. Strauss M. Strauss D. Strom L. Stutte P. Svoisky M. Takahashi A. Tanasijczuk W. Taylor M. Titov V.V. Tokmenin D. Tsybychev B. Tuchming C. Tully P.M. Tuts L. Uvarov S. Uvarov S. Uzunyan R. Van Kooten W.M. van Leeuwen N. Varelas E.W. Varnes I.A. Vasilyev P. Verdier L.S. Vertogradov M. Verzocchi M. Vesterinen D. Vilanova P. Vint P. Vokac H.D. Wahl M.H.L.S. Wang J. Warchol G. Watts M. Wayne M. Weberg L. Welty-Rieger M. Wetstein A. White D. Wicke M.R.J. Williams G.W. Wilson S.J. Wimpenny M. Wobisch D.R. Wood T.R. Wyatt Y. Xie C. Xu S. Yacoob R. Yamada W.-C. Yang T. Yasuda Y.A. Yatsunenko Z. Ye H. Yin K. Yip H.D. Yoo S.W. Youn J. Yu S. Zelitch T. Zhao B. Zhou J. Zhu M. Zielinski D. Zieminska L. Zivkovic
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classification hep-ex
keywords quarkgammawidthmeasuredassumingbranchingcollaborationcollected
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We extract the total width of the top quark, Gamma_t, from the partial decay width Gamma(t -> W b) measured using the t-channel cross section for single top quark production and from the branching fraction B(t -> W b) measured in ttbar events using up to 2.3 fb^-1 of integrated luminosity collected by the D0 Collaboration at the Tevatron ppbar Collider. The result is Gamma_t = 1.99 +0.69 -0.55 GeV, which translates to a top-quark lifetime of tau_t = (3.3 +1.3 -0.9) x 10^-25 s. Assuming a high mass fourth generation b' quark and unitarity of the four-generation quark-mixing matrix, we set the first upper limit on |Vtb'| < 0.63 at 95% C.L.

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