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Determination of the width of the top quark

Abazov, V. and Abbott, B. and Abolins, M. and Acharya, B. and Adams, M. and Adams, T. and Alexeev, G. and Alkhazov, G. and Altona, A. and Alverson, G. and Alves, G. and Ancu, L. and Aoki, M. and Arnoud, Y. and Arov, M. and Askew, A. and Åsman, B. and Atramentov, O. and Avila, C. and BackusMayes, J. and Badaud, F. and Bagby, L. and Baldin, B. and Bandurin, D. and Banerjee, S. and Barberis, E. and Baringer, P. and Barreto, J. and Bartlett, J. and Bassler, U. and Bazterra, V. and Beale, S. and Bean, A. and Begalli, M. and Begel, M. and Belanger-Champagne, C. and Bellantoni, L. and Beri, S. and Bernardi, G. and Bernhard, R. and Bertram, I. and Besançon, M. and Beuselinck, R. and Bezzubov, V. and Bhat, P. and Bhatnagar, V. and Blazey, G. and Blessing, S. and Bloom, K. and Boehnlein, A. and Boline, D. and Bolton, T. and Boos, E. and Borissov, G. and Bose, T. and Brandt, A. and Brandt, O. and Brock, R. and Brooijmans, G. and Bross, A. and Brown, D. and Brown, J. and Bu, X. and Buchholz, D. and Buehler, M. and Buescher, V. and Bunichev, V. and Burdinb, S. and Burnett, T. and Buszello, C. and Calpas, B. and Camacho-Pérez, E. and Carrasco-Lizarraga, M. and Casey, B. and Castilla-Valdez, H. and Chakrabarti, S. and Chakraborty, D. and Chan, K. and Chandra, A. and Chen, G. and Chevalier-Théry, S. and Cho, D. and Cho, S. and Choi, S. and Choudhary, B. and Christoudias, T. and Cihangir, S. and Claes, D. and Clutter, J. and Cooke, M. and Cooper, W. and Corcoran, M. and Couderc, F. and -C. 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Pleier, M. and Podesta-Lermaf, P. and Podstavkov, V. and -E. Pol, M. and Polozov, P. and Popov, A. and Prewitt, M. and Price, D. and Protopopescu, S. and Qian, J. and Quadt, A. and Quinn, B. and Rangel, M. and Ranjan, K. and Ratoff, P. and Razumov, I. and Renkel, P. and Rich, P. and Rijssenbeek, M. and Ripp-Baudot, I. and Rizatdinova, F. and Rominsky, M. and Royon, C. and Rubinov, P. and Ruchti, R. and Safronov, G. and Sajot, G. and Sánchez-Hernández, A. and Sanders, M. and Sanghi, B. and Santos, A. and Savage, G. and Sawyer, L. and Scanlon, T. and Schamberger, R. and Scheglov, Y. and Schellman, H. and Schliephake, T. and Schlobohm, S. and Schwanenberger, C. and Schwienhorst, R. and Sekaric, J. and Severini, H. and Shabalina, E. and Shary, V. and Shchukin, A. and Shivpuri, R. and Simak, V. and Sirotenko, V. and Skubic, P. and Slattery, P. and Smirnov, D. and Smith, K. and Snow, G. and Snow, J. and Snyder, S. and Söldner-Rembold, S. and Sonnenschein, L. and Sopczak, A. and Sosebee, M. and Soustruznik, K. and Spurlock, B. and Stark, J. and Stolin, V. and Stoyanova, D. and Strauss, E. and Strauss, M. and Strom, D. and Stutte, L. and Svoisky, P. and Takahashi, M. and Tanasijczuk, A. and Taylor, W. and Titov, M. and Tokmenin, V. and Tsybychev, D. and Tuchming, B. and Tully, C. and Tuts, P. and Uvarov, L. and Uvarov Uzunyan, S. and Van Kooten, R. and Van Leeuwen, W. and Varelas, N. and Varnes, E. and Vasilyev, I. and Verdier, P. and Vertogradov, L. and Verzocchi, M. and Vesterinen, M. and Vilanova, D. and Vint, P. and Vokac, P. and Wahl, H. and Wang, M. and Warchol, J. and Watts, G. and Wayne, M. and Weberg, M. and Welty-Rieger, L. and Wetstein, M. and White, A. and Wicke Williams, D. and Wilson, G. and Wimpenny, S. and Wobisch, M. and Wood, D. and Wyatt, T. and Xie, Y. and Xu, C. and Yacoob, S. and Yamada, R. and -C. Yang, W. and Yasuda, T. and Yatsunenko, Y. and Ye, Z. and Yin, H. and Yip, K. and Yoo, H. and Youn, S. and Yu, J. and Zelitch, S. and Zhao, T. and Zhou, B. and Zhu, J. and Zielinski, M. and Zieminska, D. and Zivkovic, L. (2011) Determination of the width of the top quark. Physical Review Letters, 106 (2). ISSN 1079-7114

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    Abstract

    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'|

    Item Type: Article
    Journal or Publication Title: Physical Review Letters
    Additional Information: © 2011 The American Physical Society
    Uncontrolled Keywords: hep-ex
    Subjects:
    Departments: Faculty of Science and Technology > Physics
    ID Code: 52297
    Deposited By: ep_importer_pure
    Deposited On: 12 Jan 2012 01:54
    Refereed?: Yes
    Published?: Published
    Last Modified: 21 Nov 2017 18:06
    Identification Number:
    URI: http://eprints.lancs.ac.uk/id/eprint/52297

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