The inclusive production of charmed particles in Z--><b(b)over bar> decays has been measured from the yield of D-0, D+, D-s(+) and Lambda(c)(+) decays in a sample of <q(q)over bar> events with high b purity collected with the ALEPH detector from 1992 to 1995. From these measurements, adding the charmonia production rate and an estimate of the charmed strange baryon contribution, the average number of charm quarks per b decay is determined to be n(c)=1.230+/-0.036+/-0.038+/-0.053, where the uncertainties are due to statistics, systematic effects and branching ratios, respectively.

Charm counting in b decays / D. Buskulic, I. DeBonis, D. Decamp, P. Ghez, C. Goy, J. Lees, A. Lucotte, M. Minard, J. Nief, P. Odier, B. Pietrzyk, M. Casado, M. Chmeissani, J. Crespo, M. Delfino, I. Efthymiopoulos, E. Fernandez, M. FernandezBosman, L. Garrido, A. Juste, M. Martinez, S. Orteu, C. Padilla, I. Park, A. Pascual, J. Perlas, I. Riu, F. Sanchez, F. Teubert, A. Colaleo, D. Creanza, M. dePalma, G. Gelao, M. Girone, G. Iaselli, G. Maggi, M. Maggi, N. Marinelli, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, R. Alemany, A. Bazarko, G. Bonvicini, P. BrightThomas, M. Cattaneo, F. Cerutti, P. Comas, P. Coyle, H. Drevermann, R. Forty, M. Frank, R. Hagelberg, J. Harvey, P. Janot, B. Jost, E. Kneringer, J. Knobloch, I. Lehraus, G. Lutters, E. Martin, P. Mato, A. Minten, R. Miquel, L. Mir, L. Moneta, T. Oest, A. Pacheco, J. Pusztaszeri, F. Ranjard, P. Rensing, G. Rizzo, L. Rolandi, D. Schlatter, M. Schmelling, M. Schmitt, O. Schneider, W. Tejessy, I. Tomalin, A. Venturi, H. Wachsmuth, A. Wagner, Z. Ajaltouni, A. Barres, C. Boyer, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, P. Rosnet, J. Rossignol, T. Fearnley, J. Hansen, J. Hansen, J. Hansen, P. Hansen, B. Nilsson, B. Rensch, A. Waananen, A. Kyriakis, C. Markou, E. Simopoulou, I. Siotis, A. Vayaki, K. Zachariadou, A. Blondel, G. Bonneaud, J. Brient, P. Bourdon, A. Rouge, M. Rumpf, A. Valassi, M. Verderi, H. Videau, D. Candlin, M. Parsons, E. Focardi, G. Parrini, M. Corden, C. Georgiopoulos, D. Jaffe, A. Antonelli, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, D. Casper, V. Chiarella, G. Felici, P. Laurelli, G. Mannocchi, G. Murtas, L. Passacqua, M. Pepealtarelli, L. Curtis, S. Dorris, A. Halley, I. Knowles, J. Lynch, V. OShea, C. Raine, P. Reeves, J. Scarr, K. Smith, P. Teixeiradias, A. Thompson, F. Thomson, S. Thorn, R. Turnbull, U. Becker, C. Geweniger, G. Graefe, P. Hanke, G. Hansper, V. Hepp, E. Kluge, A. Putzer, M. Schmidt, J. Sommer, H. Stenzel, K. Tittel, S. Werner, M. Wunsch, D. Abbaneo, R. Beuselinck, D. Binnie, W. Cameron, P. Dornan, A. Moutoussi, J. Nash, J. Sedgbeer, A. Stacey, M. Williams, G. Dissertori, P. Girtler, D. Kuhn, G. Rudolph, A. Betteridge, C. Bowdery, P. Colrain, G. Crawford, A. Finch, F. Foster, G. Hughes, T. Sloan, M. Williams, A. Galla, I. Giehl, A. Greene, C. Hoffmann, K. Jakobs, K. Kleinknecht, G. Quast, B. Renk, E. Rohne, H. Sander, P. vanGemmeren, C. Zeitnitz, J. Aubert, A. Bencheikh, C. Benchouk, A. Bonissent, G. Bujosa, D. Calvet, J. Carr, C. Diaconu, F. Etienne, N. Konstantinidis, P. Payre, D. Rousseau, M. Talby, A. Sadouki, M. Thulasidas, K. Trabelsi, M.R.A. Aleppo, F. Ragusa, C. Bauer, R. Berlich, W. Blum, V. Buscher, H. Dietl, F. Dydak, G. Ganis, C. Gotzhein, H. Kroha, G. Lutjens, G. Lutz, W. Manner, H. Moser, R. Richter, A. RosadoSchlosser, S. Schael, R. Settles, H. Seywerd, R. StDenis, H. Stenzel, W. Wiedenmann, G. Wolf, J. Boucrot, O. Callot, Y. Choi, A. Cordier, M. Davier, L. Duflot, J. Grivaz, P. Heusse, A. Hocker, A. Jacholkowska, M. Jacquet, D. Kim, F. LeDiberder, J. Lefrancois, A. Lutz, I. Nikolic, H. Park, M. Schune, S. Simion, J. Veillet, I. Videau, D. Zerwas, P. Azzurri, G. Bagliesi, G. Batignani, S. Bettarini, C. Bozzi, G. Calderini, M. Carpinelli, M. Ciocci, V. Ciulli, R. DellOrso, R. Fantechi, I. Ferrante, L. Foa, F. Forti, A. Giassi, M. Giorgi, A. Gregorio, F. Ligabue, A. Lusiani, P. Marrocchesi, A. Messineo, F. Palla, G. Sanguinetti, A. Sciaba, P. Spagnolo, J. Steinberger, R. Tenchini, G. Tonelli, C. Vannini, P. Verdini, G. Blair, L. Bryant, J. Chambers, Y. Gao, M. Green, T. Medcalf, P. Perrodo, J. Strong, J. vonWimmerspergToeller, D. Botterill, R. Clifft, T. Edgecock, S. Haywood, P. Maley, P. Norton, J. Thompson, A. Wright, B. BlochDevaux, P. Colas, S. Emery, W. Kozanecki, E. Lancon, M. Lemaire, E. Locci, P. Perez, J. Rander, J. Renardy, A. Roussarie, J. Schuller, J. Schwindling, A. Trabelsi, B. Vallage, S. Black, J. Dann, R. Johnson, H. Kim, A. Litke, M. McNeil, G. Taylor, C. Booth, R. Boswell, C. Brew, S. Cartwright, F. Combley, A. Koksal, M. Letho, W. Newton, J. Reeve, L. Thompson, A. Bohrer, S. Brandt, G. Cowan, C. Grupen, J. MinguetRodriguez, F. Rivera, P. Saraiva, L. Smolik, F. Stephan, M. Appollonio, L. Bosisio, R. DellaMarina, G. Giannini, B. Gobbo, G. Musolino, J. Rothberg, S. Wasserbaech, S. Armstrong, P. Elmer, Z. Feng, D. Ferguson, Y. Gao, S. Gonzalez, J. Grahl, T. Greening, O. Hayes, H. Hu, P. McNamara, J. Nachtman, W. Orejudos, Y. Pan, Y. Saadi, L. Scott, A. Walsh, J. Walsh, S. Wu, X. Wu, J. Yamartino, M. Zheng, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 388:3(1996), pp. 648-658. [10.1016/S0370-2693(96)01318-4]

Charm counting in b decays

M.R.A. Aleppo;F. Ragusa;
1996

Abstract

The inclusive production of charmed particles in Z--> decays has been measured from the yield of D-0, D+, D-s(+) and Lambda(c)(+) decays in a sample of events with high b purity collected with the ALEPH detector from 1992 to 1995. From these measurements, adding the charmonia production rate and an estimate of the charmed strange baryon contribution, the average number of charm quarks per b decay is determined to be n(c)=1.230+/-0.036+/-0.038+/-0.053, where the uncertainties are due to statistics, systematic effects and branching ratios, respectively.
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
1996
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/177732
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