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Production of charmed mesons in Z decays

  • D. Buskulic
  • , I. De Bonis
  • , D. Decamp
  • , P. Ghez
  • , C. Goy
  • , J. P. Lees
  • , M. N. Minard
  • , B. Pietrzyk
  • , F. Ariztizabal
  • , P. Comas
  • , J. M. Crespo
  • , I. Efthymiopoulos
  • , E. Fernandez
  • , M. Fernandez-Bosman
  • , V. Gaitan
  • , Ll Garrido
  • , T. Mattison
  • , S. Orteu
  • , A. Pacheco
  • , C. Padilla
  • A. Pascual, D. Creanza, M. de Palma, A. Farilla, G. Iaselli, G. Maggi, N. Marinelli, S. Natali, S. Nuzzo, A. Ranieri, G. Raso, F. Romano, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, G. Zito, Y. Chai, H. Hu, D. Huang, X. Huang, J. Lin, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, L. Zhang, W. Zhao, G. Bonvicini, J. Boudreau, D. Casper, H. Drevermann, R. W. Forty, G. Ganis, C. Gay, M. Girone, R. Hagelberg, J. Harvey, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, I. Lehraus, M. Maggi, C. Markou, M. Martinez, P. Mato, H. Meinhard, A. Minten, R. Miquel, H. G. Moser, P. Palazzi, J. R. Pater, J. A. Perlas, P. Perrodo, J. F. Pusztaszeri, F. Ranjard, L. Rolandi, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, I. R. Tomalin, R. Veenhof, H. Wachsmuth, S. Wasserbaech, W. Wiedemann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, M. Bardadin-Otwinowska, A. Barres, C. Boyer, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, J. C. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, F. Saadi, T. Fearnley, J. B. Hansen, J. D. Hansen, J. R. Hansen, P. H. Hansen, S. D. Johnson, R. Møllerud, B. S. Nilsson, A. Kyriakis, E. Simopoulou, I. Siotis, A. Vayaki, K. Zachariadou, J. Badier, A. Blondel, G. Bonneaud, J. C. Brient, B. Bourdon, G. Fouque, L. Passalacqua, A. Rougé, M. Rumpf, R. Tanaka, M. Verderi, H. Videau, D. J. Candlin, M. I. Parsons, E. Veitch, E. Focardi, L. Moneta, G. Parrini, M. Corden, M. Delfino, C. Georgiopoulos, M. Ikeda, D. E. Jaffe, D. Levinthal, A. AnTonelli, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, F. Cerutti, V. Chiarella, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, M. Pepe=Altarelli, S. Salomone, P. Colrain, I. ten Have, J. G. Lynch, W. Maitland, W. T. Morton, C. Raine, P. Reeves, J. M. Scarr, K. Smith, M. G. Smith, A. S. Thompson, S. Thorn, R. M. Turnbull, B. Brandl, O. Braun, C. Geweniger, G. Graefe, P. Hanke, V. Hepp, C. Karger, E. E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, M. Beuselinck, D. M. Binnie, W. Cameron, M. Cattaneo, D. J. Colling, P. J. Dornan, J. F. Hassard, N. M. Lieske, A. Moutoussi, J. Nash, S. Patton, D. G. Payne, M. J. Phillips, G. San Martin, J. K. Sedgbeer, A. G. Wright, P. Girtler, D. Kuhn, G. Rudolph, R. Vogl, C. K. Bowdery, T. J. Brodbeck, A. J. Finch, F. Foster, G. Hughes, D. Jackson, N. R. Keemer, M. Nuttal, A. Patel, T. Sloan, S. W. Snow, E. P. Whelan, A. Galla, A. M. Greene, K. Kleinknecht, J. Raab, B. Renk, H. G. Sander, H. Schmidt, S. M. Walther, R. Wanke, B. Wolf, A. M. Bencheikh, C. Benchouk, A. Bonissent, D. Calvet, J. Carr, P. Coyle, C. Diaconu, J. Drinkard, F. Etienne, D. Nicod, P. Payre, L. Roos, D. Rousseau, P. Schwemling, M. Talby, S. Adlung, R. Assmann, C. Bauer, W. Blum, D. Brown, P. Cattaneo, B. Dehning, H. Dietl, F. Dydak, M. Frank, A. W. Halley, K. Jakobs, J. Lauber, G. Lütjens, G. Lutz, G. Männer, R. Richter, J. Schröder, A. S. Schwarz, R. Settles, H. Seywerd, H. Stierlin, U. Stiegler, R. St Denis, G. Wolf, R. Alemany, J. Boucrot, O. Callot, A. Cordier, M. Davier, L. Duflot, J. F. Grivaz, Ph Heusse, P. Janot, D. W. Kim, F. Le Diberder, J. Lefrançois, A. M. Lutz, G. Musolino, M. H. Schune, J. J. Veillet, I. Videau, D. Abbaneo, G. Bagliesi, G. Batignani, U. Bottigli, C. Bozzi, G. Calderini, M. Carpinelli, M. A. Ciocci, V. Ciulli, R. Dell'Orso, I. Ferrante, F. Fidecaro, L. Foà, F. Forti, A. Giassi, M. A. Giorgi, A. Gregorio, F. Ligabue, A. Luisiani, E. B. Mannelli, P. S. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, P. Spagnolo, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, A. Valassi, C. Vannini, A. Venturi, P. G. Verdini, J. Walsh, A. P. Betteridge, Y. Gao, M. G. Green, D. L. Johnson, P. V. March, T. Medcalf, Ll M. Mir, I. S. Quazi, J. A. Strong, V. Bertin, D. R. Botterill, R. W. Clifft, T. R. Edgecock, S. Haywood, M. Edwards, P. R. Norton, J. C. Thompson, B. Bloch-Devaux, P. Colas, H. Duarte, S. Emery, W. Kozanecki, E. Lançon, M. C. Lemaire, E. Locci, B. Marx, P. Perez, J. Rander, J. F. Renardy, A. Rosowsky, A. Roussarie, J. P. Schuller, J. Schwindling, D. Si Mohand, B. Vallage, R. P. Johnson, A. M. Litke, G. Taylor, J. Wear, W. Babbage, C. N. Booth, C. Buttar, S. Cartwright, F. Combley, I. Dawson, L. F. Thompson, E. Barberio, A. Böhrer, S. Brandt, G. Cowan, C. Grupen, G. Lutters, F. Rivera, U. Schäfer, L. Smolik, L. Bosisio, R. Della Marina, G. Giannini, B. Bobbo, L. Pitis, F. Ragusa, L. Bellantoni, W. Chen, J. S. Conway, Z. Feng, D. P.S. Ferguson, Y. S. Gao, J. Grahl, J. L. Harton, O. J. Hayes, J. M. Nachtman, Y. B. Pan, Y. Saadi, M. Schmitt, I. Scott, V. Sharma, Z. H. Shi, J. D. Turk, A. M. Walsh, F. V. Weber, Sau Lan Wu, X. Wu, M. Zheng, G. Zobernig
  • Université Paris-Sud
  • University of São Paulo
  • INFN Sezione di Bari
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • European Organization for Nuclear Research
  • Université Blaise Pascal
  • Niels Bohr Institutet
  • NCSR Demokritos
  • Department of Physics
  • University of Edinburgh
  • University of Florence
  • Supercomputer Computations Research Institute
  • Florida State University
  • LNF-INFN
  • Department of Physics and Astronomy
  • University of Glasgow
  • Institut für Hochenergiephysik
  • University of Heidelberg
  • Department of Physics
  • Imperial College London
  • Institut für Experimentalphysik
  • University of Innsbruck
  • Lancaster University
  • Institut für Physik
  • Johannes Gutenberg University
  • Max-Planck-Institut für Physik
  • Laboratoire de l'Accélérateur Linéaire
  • University of Pisa
  • King's College London
  • Rutherford Appleton Laboratory
  • PPE Division
  • Institut Pierre Simon Laplace, CNRS and CEA
  • University of California at Santa Cruz
  • Department of Physics
  • The University of Sheffield
  • Fachbereich Physik
  • Universität Siegen
  • Dipartimento di Fisica
  • University of Trieste
  • University of Wisconsin-Madison

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)

Abstract

The production of charmed mesons {Mathematical expression}, D±, and D is studied in a sample of 478,000 hadronic Z decays. The production rates are measured to be {Mathematical expression} where the errors from this analysis are separated from those coming from the D branching ratios (BR). The D momentum distribution is extracted separately for {Mathematical expression} and {Mathematical expression} events with the help of event shape variables. It is consistent with the prediction of the JETSET Monte Carlo program after adjustment of the charm fragmentation function. Constraining the shape of the {Mathematical expression} contribution, the average fraction of the beam energy taken by a D* meson produced in the fragmentation of a charm quark is extracted by a parametric fit to be <XE>c=0.495±0.011±0.007. Evidence for D**0 (D1(2420)0 and/or D2 *(2460)0) production is found in the {Mathematical expression} channel, accounting for a fraction (18±5±2)% of all D production. The relative production of vector and pseudoscalar mesons is dicussed, together with the possible effects of D** production. The c-quark forward-backward Z-pole asymmetry is detrmined from that of high momentum D to be AFB 0,c=(7.7±4.4)%.

Original languageEnglish
Pages (from-to)1-14
Number of pages14
JournalZeitschrift für Physik C Particles and Fields
Volume62
Issue number1
DOIs
Publication statusPublished - 1 Jan 1994

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