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Measurement of B(t$\to$Wb)/B(t$\to$Wq) at $\sqrt(s)$ = 1.96 TeV

By V.M. Abazov, B. Abbott, M. Abolins, B.S. Acharya, M. Adams, T. Adams, M. Agelou, J.L. Agram, S.H. Ahn, M. Ahsan, G.D. Alexeev, G. Alkhazov, A. Alton, G. Alverson, G.A. Alves, M. Anastasoaie, T. Andeen, S. Anderson, B. Andrieu, M.S. Anzelc, Y. Arnoud, M. Arov, A. Askew, B. Asman, A.C.S. Assis Jesus, O. Atramentov, C. Autermann, C. Avila, C. Ay, F. Badaud, A. Baden, L. Bagby, B. Baldin, D.V. Bandurin, P. Banerjee, S. Banerjee, E. Barberis, P. Bargassa, P. Baringer, C. Barnes, J. Barreto, J.F. Bartlett, U. Bassler, D. Bauer, A. Bean, M. Begalli, M. Begel, A. Bellavance, J. Benitez, S.B. Beri, G. Bernardi, R. Bernhard, L. Berntzon, I. Bertram, M. Besançon, R. Beuselinck, V.A. Bezzubov, P.C. Bhat, V. Bhatnagar, M. Binder, C. Biscarat, K.M. Black, I. Blackler, G. Blazey, F. Blekman, S. Blessing, D. Bloch, U. Blumenschein, A. Boehnlein, O. Boeriu, T.A. Bolton, F. Borcherdin, G. Borissov, K. Bos, T. Bose, A. Brandt, R. Brock, G. Brooijmans, A. Bross, D. Brown, N.J. Buchanan, D. Buchholz, M. Buehler, V. Buescher, S. Burdin, S. Burke, T.H. Burnett, Emmanuel Busato, C.P. Buszello, J.M. Butler, S. Calvet, J. Cammin, S. Caron, W. Carvalho, B.C.K. Casey, N.M. Cason, H. Castilla-Valdez, S. Chakrabarti, D. Chakraborty, K.M. Chan, A. Chandra, D. Chapin, F. Charles, E. Cheu, F. Chevallier, D.K. Cho, S. Choi, B. Choudhary, T. Christiansen, L. Christofek, D. Claes, B. Clément, C. Clément, Y. Coadou, M. Cooke, W.E. Cooper, D. Coppage, M. Corcoran, M.-C. Cousinou, B. Cox, S. Crépé-Renaudin, D. Cutts, M. Cwiok, H. Da Motta, A. Das, M. Das, B. Davies, G. Davies, G.A. Davis, K. De, P. De Jong, S.J. De Jong, E. De La Cruz-Burelo, C. De Oliveira Martins, J.D. Degenhardt, F. Déliot, M. Demarteau, R. Demina, P. Demine, D. Denisov, S.P. Denisov, S. Desai, H.T. Diehl, M. Diesburg, M. Doidge, H. Dong, S. Doulas, L.V. Dudko, L. Duflot, S.R. Dugad, A. Duperrin, J. Dyer, A. Dyshkant, M. Eads, D. Edmunds, T. Edwards, J. Ellison, J. Elmsheuser, V.D. Elvira, S. Eno, P. Ermolov, J. Estrada, H. Evans, A. Evdokimov, V.N. Evdokimov, S.N. Fatakia, L. Feligioni, A.V. Ferapontov, T. Ferbel, F. Fiedler, F. Filthaut, W. Fisher, H.E. Fisk, I. Fleck, M. Ford, M. Fortner, H. Fox, S. Fu, S. Fuess, T. Gadfort, C.F. Galea, E. Gallas, E. Galyaev, C. Garcia, A. Garcia-Bellido, J. Gardner, V. Gavrilov, A. Gay, Pascal Gay, D. Gelé, R. Gelhaus, C.E. Gerber, Y. Gershtein, D. Gillberg, G. Ginther, T. Golling, N. Gollub, B. Gomez, K. Gounder, A. Goussiou, P.D. Grannis, S. Greder, H. Greenlee, Z.D. Greenwood, E.M. Gregores, G. Grenier, Ph. Gris, J.-F. Grivaz, S. Grünendahl, M.W. Grünewald, J. Guo, G. Gutierrez, P. Gutierrez, A. Haas, N.J. Hadley, P. Haefner, S. Hagopian, J. Haley, I. Hall, R.E. Hall, L. Han, K. Hanagaki, K. Harder, A. Harel, R. Harrington, J.M. Hauptman, R. Hauser, J. Hays, T. Hebbeker, D. Hedin, J.G. Hegeman, J.M. Heinmiller, A.P. Heinson, U. Heintz, C. Hensel, G. Hesketh, M.D. Hildreth, R. Hirosky, J.D. Hobbs, B. Hoeneisen, M. Hohlfeld, S.J. Hong, R. Hooper, P. Houben, Y. Hu, V. Hynek, I. Iashvili, R. Illingworth, A.S. Ito, S. Jabeen, M. Jaffré, S. Jain, K. Jakobs, C. Jarvis, A. Jenkins, R. Jesik, K. Johns, C. Johnson, M. Johnson, A. Jonckheere, P. Jonsson, A. Juste, D. Käfer, S. Kahn, E. Kajfasz, A.M. Kalinin, J.M. Kalk, J.R. Kalk, D. Karmanov, J. Kasper, I. Katsanos, D. Kau, R. Kaur, R. Kehoe, S. Kermiche, S. Kesisoglou, A. Khanov, A. Kharchilava, Y.M. Kharzheev, D. Khatidze, H. Kim, T.J. Kim, M.H. Kirby, B. Klima, J.M. Kohli, J.-P. Konrath, M. Kopal, V.M. Korablev, J. Kotcher, B. Kothari, A. Koubarovsky, A.V. Kozelov, J. Kozminski, A. Kryemadhi, S. Krzywdzinski, T. Kuhl, A. Kumar, S. Kunori, A. Kupco, T. Kurca, J. Kvita, S. Lager, S. Lammers, G. Landsberg, J. Lazoflores, A.C. Le Bihan, P. Lebrun, W.M. Lee, A. Leflat, F. Lehner, C. Leonidopoulos, V. Lesne, J. Leveque, P. Lewis, J. Li, Q.Z. Li, J.G.R. Lima, D. Lincoln, J. Linnemann, V.V. Lipaev, R. Lipton, L. Lobo, A. Lobodenko, M. Lokajicek, A. Lounis, P. Love, H.J. Lubatti, M. Lynker, A.L. Lyon, A.K.A. Maciel, R.J. Madaras, P. Mättig, C. Magass, A. Magerkurth, A.M. Magnan, N. Makovec, P.K. Mal, H.B. Malbouisson, S. Malik, V.L. Malyshev, H.S. Mao, Y. Maravin, M. Martens, S.E.K. Mattingly, R. McCarthy, R. Mccroskey, D. Meder, A. Melnitchouk, A. Mendes, Luis Mendoza, M. Merkin, K.W. Merritt, A. Meyer, J. Meyer, M. Michaut, H. Miettinen, J. Mitrevski, J. Molina, N.K. Mondal, J. Monk, R.W. Moore, T. Moulik, G.-S. Muanza, M. Mulders, L. Mundim, Y.D. Mutaf, E. Nagy, M. Naimuddin, M. Narain, N.A. Naumann, H.A. Neal, J.P. Negret, S. Nelson, P. Neustroev, C. Noeding, A. Nomerotski, S.F. Novaes, T. Nunnemann, E. Nurse, V. O'Dell, D.C. O'Neil, G. Obrant, V. Oguri, N. Oliveira, N. Oshima, R. Otec, G.J. Otero Y Garzon, M. Owen, P. Padley, N. Parashar, S.K. Park, J. Parsons, R. Partridge, N. Parua, A. Patwa, G. Pawloski, P.M. Perea, E. Perez, P. Pétroff, M. Petteni, R. Piegaia, M.-A. Pleier, P.L.M. Podesta-Lerma, V.M. Podstavkov, Y. Pogorelov, M.-E. Pol, A. Pompos, B.G. Pope, A.V. Popov, W.L. Prado Da Silva, H.B. Prosper, S. Protopopescu, J. Qian, A. Quadt, B. Quinn, K.J. Rani, K. Ranjan, P.A. Rapidis, P.N. Ratoff, P. Renkel, S. Reucroft, M. Rijssenbeek, I. Ripp-Baudot, F. Rizatdinova, S. Robinson, R.F. Rodrigues, C. Royon, P. Rubinov, R. Ruchti, V.I. Rud, G. Sajot, A. Sanchez-Hernandez, M.P. Sanders, A. Santoro, G. Savage, L. Sawyer, T. Scanlon, D. Schaile, R.D. Schamberger, Y. Scheglov, H. Schellman, P. Schieferdecker, C. Schmitt, C. Schwanenberger, A. Schwartzman, R. Schwienhorst, S. Sengupta, H. Severini, E. Shabalina, M. Shamim, V. Shary, A.A. Shchukin, W.D. Shephard, R.K. Shivpuri, D. Shpakov, V. Siccardi, R.A. Sidwell, V. Simak, V. Sirotenko, P. Skubic, P. Slattery, R.P. Smith, G.R. Snow, J. Snow, S. Snyder, S. Söldner-Rembold, X. Song, L. Sonnenschein, A. Sopczak, M. Sosebee, K. Soustruznik, M. Souza, B. Spurlock, J. Stark, J. Steele, K. Stevenson, V. Stolin, A. Stone, D.A. Stoyanova, J. Strandberg, M.A. Strang, M. Strauss, R. Ströhmer, D. Strom, M. Strovink, L. Stutte, S. Sumowidagdo, A. Sznajder, M. Talby, P. Tamburello, W. Taylor, P. Telford, J. Temple, B. Tiller, M. Titov, V.V. Tokmenin, M. Tomoto, T. Toole, I. Torchiani, S. Towers, T. Trefzger, S. Trincaz-Duvoid, D. Tsybychev, B. Tuchming, C. Tully, A.S. Turcot, P.M. Tuts, R. Unalan, L. Uvarov, S. Uvarov, S. Uzunyan, B. Vachon, P.J. Van Den Berg, R. Van Kooten, W.M. Van Leeuwen, N. Varelas, E.W. Varnes, A. Vartapetian, I.A. Vasilyev, M. Vaupel, P. Verdier, L.S. Vertogradov, M. Verzocchi, F. Villeneuve-Seguier, J.-R. Vlimant, E. Von Toerne, M. Voutilainen, M. Vreeswijk, H.D. Wahl, L. Wang, J. Warchol, G. Watts, M. Wayne, M. Weber, H. Weerts, N. Wermes, M. Wetstein, A. White, V. White, D. Wicke, D.A. Wijngaarden, G.W. Wilson, S.J. Wimpenny, M. Wobisch, J. Womersley, D.R. Wood, T.R. Wyatt, Y. Xie, N. Xuan, S. Yacoob, R. Yamada, M. Yan, T. Yasuda, Y.A. Yatsunenko, Y. Yen, K. Yip, H.D. Yoo, S.W. Youn, J. Yu, A. Yurkewicz, A. Zatserklyaniy, C. Zeitnitz, D. Zhang, T. Zhao, Z. Zhao, B. Zhou, J. Zhu, M. Zielinski, D. Zieminska, A. Zieminski, V. Zutshi and E.G. Zverev

Abstract

7 pages, 1 figure - D0We present the measurement of R = B(t->Wb)/B(t->Wq) in ppbar collisions at sqrt(s) = 1.96 TeV, using 230 pb-1 of data collected by the DO experiment at the Fermilab Tevatron Collider. We fit simultaneously R and the number of selected top quark pairs (ttbar), to the number of identified b-quark jets in events with one electron or one muon, three or more jets, and high transverse energy imbalance. To improve sensitivity, kinematical properties of events with no identified b-quark jets are included in the fit. We measure R = 1.03 +0.19 -0.17 (stat+syst), in good agreement with the standard model. We set lower limits of R > 0.61 and |V_tb| > 0.78 at 95% confidence level

Topics: 12.15.Hh; 14.65.Ha, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: 'Elsevier BV'
Year: 2006
DOI identifier: 10.1016/j.physletb.2006.07.019
OAI identifier: oai:HAL:in2p3-00025745v1
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