| Thème(s) : |
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Physique/Physique des Hautes Energies - Expérience
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| Titre : |
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A measurement of the branching fractions of the b-quarks into charged and neutral b-hadrons |
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| Auteur : |
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J. Abdallah1, P. Abreu, W. Adam, P. Adzic, T. Albrecht, T. Alderweireld, R. Alemany-Fernandez, T. Allmendinger, P.P. Allport, U. Amaldi, N. Amapane, S. Amato, E. Anashkin, A. Andreazza, S. Andringa, N. Anjos, P. Antilogus, W.D. Apel, Y. Arnoud2, S. Ask, B. asman, J.-E. Augustin1, A. Augustinus, P. Baillon, A. Ballestrero, P. Bambade3, R. Barbier4, D. Bardin, G. Barker, A. Baroncelli, M. Battaglia, M. Baubillier1, K.H. Becks, M. Begalli, A. Behrmann, E. Ben-Haim3, N. Benekos, A. Benvenuti, C. Berat2, M. Berggren1, L. Berntzon, D. Bertrand, M. Besancon, N. Besson, D. Bloch5, M. Blom, M. Bluj, M. Bonesini, M. Boonekamp, P.S.L. Booth, G. Borisov, O. Botner, B. Bouquet3, T.J.V. Bowcock, I. Boyko, M. Bracko, R. Brenner, E. Brodet, P. Bruckman, J.M. Brunet6, L. Bugge, P. Buschmann, M. Calvi, T. Camporesi, V. Canale, F. Carena, N. Castro, F. Cavallo, M. Chapkin, P. Charpentier, P. Checchia, R. Chierici, P. Chliapnikov, J. Chudoba, S.U. Chung, K. Cieslik, P. Collins, R. Contri, G. Cosme3, F. Cossutti, M.J. Costa, B. Crawley, D. Crennell, J. Cuevas, J. D'Hondt, J. Dalmau, T. Da Silva, W. Da Silva1, G. Della Ricca, A. De Angelis, W. de Boer, C. De Clercq, B. De Lotto, N. De Maria, A. De Min, L. De Paula, L. Di Ciaccio, A. Di Simone, K. Doroba, J. Drees, M. Dris, G. Eigen, T. Ekelof, M. Ellert, M. Elsing, M.C. Espirito Santo, G. Fanourakis, D. Fassouliotis, M. Feindt, J. Fernandez, A. Ferrer, F. Ferro, U. Flagmeyer, H. Foeth, E. Fokitis, F. Fulda-Quenzer3, J. Fuster, M. Gandelman, C. Garcia, P. Gavillet, E. Gazis, R. Gokieli, B. Golob, G. Gomez-Ceballos, P. Goncalves, E. Graziani, G. Grosdidier3, K. Grzelak, J. Guy, C. Haag, A. Hallgren, K. Hamacher, K. Hamilton, J. Hansen, S. Haug, F. Hauler, V. Hedberg, M. Hennecke, H. Herr, J. Hoffman, S.O. Holmgren, P.J. Holt, M.A. Houlden, K. Hultqvist, J.N. Jackson, G. Jarlskog, P. Jarry, D. Jeans, E.K. Johansson, P.D. Johansson, P. Jonsson4, C. Joram, L. Jungermann, F. Kapusta1, S. Katsanevas4, E. Katsoufis, G. Kernel, B.P. Kersevan, A. Kiiskinen, B.T. King, N.J. Kjaer, P. Kluit, P. Kokkinias, C. Kourkoumelis, O. Kouznetsov, Z. Krumstein, M. Kucharczyk, J. Lamsa, G. Leder, F. Ledroit2, L. Leinonen, R. Leitner, J. Lemonne, V. Lepeltier3, T. Lesiak, W. Liebig, D. Liko, A. Lipniacka, J.H. Lopes, J.M. Lopez, D. Loukas, P. Lutz, L. Lyons, J. MacNaughton, A. Malek, S. Maltezos, F. Mandl, J. Marco, R. Marco, B. Marechal, M. Margoni, J.C. Marin, C. Mariotti, A. Markou, C. Martinez-Rivero, J. Masik, N. Mastroyiannopoulos, F. Matorras, C. Matteuzzi, F. Mazzucato, M. Mazzucato, R. McNulty, C. Meroni, W.T. Meyer, E. Migliore, W. Mitaroff, U. Mjoernmark, T. Moa, M. Moch, K. Moenig, R. Monge, J. Montenegro, D. Moraes, S. Moreno, P. Morettini, U. Mueller, K. Muenich, M. Mulders, L. Mundim, W. Murray, B. Muryn, G. Myatt, T. Myklebust, M. Nassiakou, F. Navarria, K. Nawrocki, R. Nicolaidou, M. Nikolenko5, A. Oblakowska-Mucha, V. Obraztsov, A. Olshevski, A. Onofre, R. Orava, K. Osterberg, A. Ouraou, A. Oyanguren, M. Paganoni, S. Paiano, J.P. Palacios, H. Palka, T.D. Papadopoulou, L. Pape, C. Parkes, F. Parodi, U. Parzefall, A. Passeri, O. Passon, L. Peralta, V. Perepelitsa, A. Perrotta, A. Petrolini, J. Piedra, L. Pieri, F. Pierre, M. Pimenta, E. Piotto, T. Podobnik, V. Poireau, M.E. Pol, G. Polok, P. Poropaty, V. Pozdniakov, N. Pukhaeva, A. Pullia, J. Rames, L. Ramler, A. Read, P. Rebecchi, J. Rehn, D. Reid, R. Reinhardt, P. Renton, F. Richard3, J. Ridky, M. Rivero, D. Rodriguez, A. Romero, P. Ronchese, E. Rosenberg, P. Roudeau3, T. Rovelli, V. Ruhlmann-Kleider, D. Ryabtchikov, A. Sadovsky, L. Salmi, J. Salt, A. Savoy-Navarro1, U. Schwickerath, A. Segar, R. Sekulin, M. Siebel, A. Sisakian, G. Smadja4, O. Smirnova, A. Sokolov, A. Sopczak, R. Sosnowski, T. Spassov, M. Stanitzki, A. Stocchi3, J. Strauss, B. Stugu, M. Szczekowski, M. Szeptycka, T. Szumlak, T. Tabarelli, A.C. Taffard, F. Tegenfeldt, J. Timmermans, L. Tkatchev, M. Tobin, S. Todorovova, B. Tome, A. Tonazzo, P. Tortosa, P. Travnicek, D. Treille, G. Tristram6, M. Trochimczuk, C. Troncon, M.L. Turluer, I.A. Tyapkin, P. Tyapkin, S. Tzamarias, V. Uvarov, G. Valenti, P. van Dam, J. Van Eldik, A. Van Lysebetten, N. Van Remortel, I. Van Vulpen, G. Vegni, F. Veloso, W. Venus, F. Verbeure, P. Verdier4, V. Verzi, D. Vilanova, L. Vitale, V. Vrba, H. Wahlen, A.J. Washbrook, C. Weiser, D. Wicke, J. Wickens, G. Wilkinson, M. Winter5, M. Witek, O. Yushchenko, A. Zalewska, P. Zalewski, D. Zavrtanik, V. Zhuravlov, N.I. Zimin, A. Zintchenko, M. Zupan |
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| Laboratoire : |
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| Résumé : |
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The production fractions of charged and neutral b-hadrons in b-quark events from Z0 decays have been measured with the DELPHI detector at LEP. An algorithm has been developed, based on a neural network, to estimate the charge of the weakly-decaying b-hadron by distinguishing its decay products from particles produced at the primary vertex. From the data taken in the years 1994 and 1995, the fraction of bbar-quarks fragmenting into positively charged weakly-decaying b-hadrons has been measured to be: f^+ = (42.09 +/- 0.82 (stat.) +/- 0.89 (syst.))%. Subtracting the rates for charged Xibar_b^+ and Omegabar_b^+ baryons gives the production fraction of B^+ mesons: f_Bu = (40.99 +/- 0.82 (stat.) +/- 1.11 (syst.))%. |
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| Collaboration/Projet : |
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DELPHI |
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| Type de publication : |
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Articles dans des revues avec comité de lecture |
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Date de publication
ou d'écriture : |
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2003 |
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| Nom du périodique : |
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| Physics Letters B (Phys. Lett. B) |
| Publisher |
Elsevier |
| ISSN |
0370-2693 |
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| Volume : |
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576 |
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| Page/Article : |
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29-42 |
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| Identifiant local : |
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CERN-EP-2003-044,LYCEN 2003-43,ISN 0333,PCC 03 47,LAL 03-94 |
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| Commentaire : |
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Delphi |
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