Accès ouvert déclaré
1999
preprint
Measurement of the probability for gluon splitting into b anti-b in Z0 decays
Kenji Abe, P. F. Jacques, H. Hwang, T. W. Reeves, R. K. Yamamoto, Ronald Cassell, J. Gifford, Edoardo Mazzucato, P. Stamer, H. Staengle, E. Church, G. Bellodi, D. Falciai, V. S. Murzin, L.S. Rochester, A. Lath, M. Carpinelli, R. H. Schindler, V. Eschenburg, M. Breidenbach, K. C. Moffeit, J. P. Venuti, Michael J Fero, Jennifer S. Huber, ROBERT ALAN JOHNSON, A. Stahl, A. D’Oliveira, Ryochi Kajikawa, S. Narita, I. Karliner, Gordon Watts, Terry LeRoy Schalk, Ankang Lu, R. J. Plano, Giancarlo Mantovani, J. J. Russell, M. Iwasaki, Glen D. Crawford, H.O. Cohn, R. Steiner, James J. Reidy, Y.D. Kim, S. Walston, S. Suzuki, K. Abe, H. L. Lynch, Г.Л. Башинджагян, R. Prepost, K. Hasuko, X. F. Yang, R. Messner, Gary E. Gladding, R. Ben-David, T. Takahashi, T. Gillman, K. D. Shmakov, M. Kalelkar, M.H. Shaevitz, R. E. Frey, Louis S. Osborne, Aaron S. Chou, K. T. Flood, Piero Giorgio Verdini, J. L. Wittlin, C. Simopoulos, S. Willocq, Xuan Nghia Huynh, Riccardo de Sangro, S. Manly, Dongbing Su, C. Vannini, Marcello Piccolo, H. J. Kang, U. Nauenberg, G. Shapiro, J. Zhou, P. Mockett, E. Vella, T. Maruyama, E. R. Weiss, C. Lin, G.D. Punkar, G. Blaylock, R. S. Kroeger, R. Castaldi, T. R. Junk, James Vincent Mead, D.L. Wagner, D. Calloway, J.M. Yamartino, G. Zapalac, S. González, T. Nagamine, P. Dervan, H. Steiner, C. Y. Prescott, Jaroslav Va'vra, J. M. Bauer, D. L. Burke, Thomas W. Markiewicz, J. Quigley, Victor Cook, S. R. Wagner, N. J. Allen, H. R. Band, O. Bardon, M. Barakat, N. Murali Krishna, A. Szumilo, A. K. McKemey, A. Castro, G. R. Bower, E. W. Hughes, A. W. Weidemann, Charles Baltay, Peter C Rowson, T. Barklow, J. T. Shank, F. J. Wickens, D. Bisello, S.R. Smith, Donald G. Coyne, A. S. Johnson, Matthew D. Langston, G. M. Bilei, M.E. Huffer, M. Loreti, J. Wang, David W.G.S. Leith, S. Fahey, H. Yuta, B. A. Schumm, R. F. Cowan, T. Wright, T. B. Moore, F. Suekane, J. A. Snyder, I. Peruzzi, David Jeff Jackson, C. Fan, Kevin T. Pitts, R. R. Kofler, V. Lia, R. Verdier, S. Sen, P.N. Burrows, Michael G. Strauss, L. Piemontese, Bob I. Eisenstein, W.W. Ash, Steven J. Yellin, Bianca C. Williams, S. H. Williams, N. B. Sinev, K. Baird, D. J. Sherden, H. Masuda, John L. Harton, Morris L. Swartz, Hildreth, Koya Abe, Jing-Ze Ma, M. King, T.J. Pavel, Giuliana Menegatti, Chris Damerell, M.M. Morii, Zihao Jiang, M. B. SMY, N. Oishi, J. R. Johnson, F. Šforza, E. Torrence, J. P. Fernandez, A. P. Waite, Per L Reinertsen, Mihai Octavian Dima, William J. Wisniewski, J. Thom, Jochen Schwiening, A. Sugiyama, H. Neal, C. C. Young, E. Etzion, John A Jaros, D. C. Williams, Yuri A. Kamyshkov, Ilke Adam, H. Kawahara, X. Liu, J. S. Whitaker, R. J. Wilson, Dingkui Dong, DAVID J. MULLER, A. C. Benvenuti, B. N. Ratcliff, V.V. Serbo, M.N. Danielson, R. Dell’Orso, M. Nussbaum, N. De Groot, C.H. Park, T. Akagi, W. M. Bugg, F. E. Taylor, G.B. Word, J. Wyss, O. H. Saxton, J. Yashima, Abdulqader Ali Hasan, Samuel Hedges, P. Rensing, M.X. Liu, T. H. Burnett, M. Woods, Stanley S. Hertzbach, E. L. Hart, R. S. Panvini, Alessandro Calcaterra, J. A. Coller, M. Daoudi, D. A. Aston, Giampiero Mancinelli, R. Dubois, T. Usher, B. Camanzi, Sebastian White, R. W. Zdarko, Nicolaos Toumbas, M. R. Convery, D. Onoprienko, M. Doser, E.R. Goodman, J. R. Bogart, R. S. B. King
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0Institutions déclarées
0Pays d’affiliation déclarés
Le résumé fourni par la source
We present a preliminary measurement of the rate of gluon splitting into bottom quarks, g -> b bbar, in hadronic Z0 decays collected by SLD between 1996 and 1998. The analysis was performed by looking for secondary bottom production in 4-jet events of any primary flavour. 4-jet events were identified, and a topological vertex-mass technique was applied to each jet in order to identify b or bbar jets. The upgraded CCD based vertex detector gives very high B-tagging efficiency, especially for B hadrons of the low energies typical of this process. The two most nearly collinear b/bbar jets were tagged as originating from g -> b bbar. We measured the rate of secondary b/bbar production per hadronic event, g_bb, to be (3.07+-0.71(stat.)+-0.66(syst.)) * 10**-3.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
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Les sujets associés
Particle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchParticle Detector Development and Performance