The lifetimes of the B0BAR and B- mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of B0BAR and B- mesons were partially reconstructed by identifying events containing a lepton with an associated D*+ or D0 meson. The proper time of the B meson was estimated from the measured decay length and the momentum and mass of the D-lepton system. A fit to the proper time of 77 D*+l- and 77 D0l- candidates, combined with a constraint on the lifetime ratio (tau-/tau0) arising from the relative rates of observed D*+l- and D0l- events, yielded the following lifetimes: tau0 = 1.52(+0.20/-0.18) (stat. )+0.07/-0.13 (syst.) ps, tau = 1.47(+0.22/-0.19) (stat.)+0.15/-0.14 (syst.) ps, tau-/tau0 = 0.96(+0.19/-0.15) (stat. )+0.18/-0.12(syst.).

Measurement of the (B)over-bar-0 and B-meson lifetimes / D. Buskulic, D. Decamp, C. Goy, J. Lees, M. Minard, B. Mours, B. Pietrzyk, R. Alemany, F. Ariztizabal, P. Comas, J. Crespo, M. Delfino, E. Fernandez, M. Fernandezbosman, V. Gaitan, L. Garrido, T. Mattison, A. Pacheco, C. Padilla, A. Pascual, D. Creanza, M. Depalma, A. Farilla, G. Iaselli, G. Maggi, M. Maggi, S. Natali, S. Nuzzo, M. Quattromini, 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, L. Bauerdick, E. Blucher, G. Bonvicini, J. Boudreau, D. Casper, H. Drevermann, R. Forty, G. Ganis, C. Gay, R. Hagelberg, J. Harvey, S. Haywood, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, I. Lehraus, T. Lohse, A. Lusiani, M. Martinez, P. Mato, H. Meinhard, A. Minten, A. Miotto, R. Miquel, H. Moser, P. Palazzi, J. Perlas, J. Pusztaszeri, F. Ranjard, G. Redlinger, L. Rolandi, J. Rothberg, T. Ruan, M. Saich, D. Schlatter, M. Schmelling, F. Sefkow, W. Tejessy, H. Wachsmuth, W. Wiedenmann, T. Wildish, W. Witzeling, J. Wotschack, Z. Ajaltouni, F. Badaud, M. Bardadinotwinowska, R. Elfellous, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, J. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, F. Prulhiere, F. Saadi, T. Fearnley, J. Hansen, J. Hansen, P. Hansen, R. Mollerud, B. Nilsson, I. Efthymiopoulos, A. Kyriakis, E. Simopoulou, A. Vayaki, K. Zachariadou, J. Badier, A. Blondel, G. Bonneaud, J. Brient, G. Fouque, S. Orteu, A. Rouge, M. Rumpf, R. Tanaka, M. Verderi, H. Videau, D. Candlin, M. Parsons, E. Veitch, L. Moneta, G. Parrini, M. Corden, C. Georgiopoulos, M. Ikeda, J. Lannutti, D. Levinthal, M. Mermikides, L. Sawyer, S. Wasserbaech, A. Antonelli, R. Baldini, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, F. Cerutti, V. Chiarella, B. Dettorrepiazzoli, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. Murtas, L. Passalacqua, M. Pepealtarelli, P. Picchi, P. Colrain, I. Tenhave, J. Lynch, W. Maitland, W. Morton, C. Raine, P. Reeves, J. Scarr, K. Smith, M. Smith, A. Thompson, R. Turnbull, B. Brandl, O. Braun, C. Geweniger, P. Hanke, V. Hepp, E. Kluge, Y. Maumary, A. Putzer, B. Rensch, A. Stahl, K. Tittel, M. Wunsch, A. Belk, R. Beuselinck, D. Binnie, W. Cameron, M. Cattaneo, D. Colling, P. Dornan, S. Dugeay, A. Greene, J. Hassard, N. Lieske, J. Nash, D. Payne, M. Phillips, J. Sedgbeer, I. Tomalin, A. Wright, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, C. Bowdery, T. Brodbeck, A. Finch, F. Foster, G. Hughes, D. Jackson, N. Keemer, M. Nuttall, A. Patel, T. Sloan, S. Snow, E. Whelan, K. Kleinknecht, J. Raab, B. Renk, H. Sander, H. Schmidt, F. Steeg, S. Walther, R. Wanke, B. Wolf, J. Aubert, A. Bencheikh, C. Benchouk, A. Bonissent, J. Carr, P. Coyle, J. Drinkard, F. Etienne, D. Nicod, S. Papalexiou, 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. Halley, J. Lauber, G. Lutjens, G. Lutz, W. Manner, R. Richter, H. Rotscheidt, J. Schroder, A. Schwarz, R. Settles, H. Seywerd, U. Stierlin, U. Stiegler, R. Stdenis, G. Wolf, J. Boucrot, O. Callot, A. Cordier, M. Davier, L. Duflot, J. Grivaz, P. Heusse, D. Jaffe, P. Janot, D. Kim, F. Lediberder, J. Lefrancois, A. Lutz, M. Schune, J. Veillet, I. Videau, Z. Zhang, D. Abbaneo, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bozzi, G. Calderini, M. Carpinelli, M. Ciocci, R. Dellorso, I. Ferrante, F. Fidecaro, L. Foa, E. Focardi, F. Forti, A. Giassi, M. Giorgi, A. Gregorio, F. Ligabue, E. Mannelli, P. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, P. Spagnolo, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini, A. Venturi, P. Verdini, J. Walsh, A. Betteridge, J. Carter, M. Green, P. March, L. Mir, T. Medcalf, I. Quazi, J. Strong, L. West, D. Botterill, R. Clifft, T. Edgecock, M. Edwards, S. Fisher, T. Jones, P. Norton, D. Salmon, J. Thompson, B. Blochdevaux, P. Colas, H. Duarte, W. Kozanecki, E. Lancon, M. Lemaire, E. Locci, P. Perez, F. Perrier, J. Rander, J. Renardy, A. Rosowsky, A. Roussarie, J. Schuller, J. Schwindling, D. Mohand, B. Vallage, R. Johnson, A. Litke, G. Taylor, J. Wear, J. Ashman, W. Babbage, C. Booth, C. Buttar, R. Carney, S. Cartwright, F. Combley, F. Hatfield, L. Thompson, E. Barberio, A. Bohrer, S. Brandt, G. Cowan, C. Grupen, G. Lutters, F. Rivera, U. Schafer, L. Smolik, R. Dellamarina, G. Giannini, B. Gobbo, F. Ragusa, L. Bellantoni, W. Chen, D. Cinabro, J. Conway, D. Cowen, Z. Feng, D. Ferguson, Y. Gao, J. Grahl, J. Harton, R. Jared, B. Leclaire, C. Lishka, Y. Pan, J. Pater, Y. Saadi, V. Sharma, M. Schmitt, Z. Shi, A. Walsh, F. Weber, S. Wu, X. Wu, M. Zheng, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 307:1/2(1993), pp. 194-208.

Measurement of the (B)over-bar-0 and B-meson lifetimes

F. Ragusa;
1993

Abstract

The lifetimes of the B0BAR and B- mesons have been measured with the ALEPH detector at LEP. Semileptonic decays of B0BAR and B- mesons were partially reconstructed by identifying events containing a lepton with an associated D*+ or D0 meson. The proper time of the B meson was estimated from the measured decay length and the momentum and mass of the D-lepton system. A fit to the proper time of 77 D*+l- and 77 D0l- candidates, combined with a constraint on the lifetime ratio (tau-/tau0) arising from the relative rates of observed D*+l- and D0l- events, yielded the following lifetimes: tau0 = 1.52(+0.20/-0.18) (stat. )+0.07/-0.13 (syst.) ps, tau = 1.47(+0.22/-0.19) (stat.)+0.15/-0.14 (syst.) ps, tau-/tau0 = 0.96(+0.19/-0.15) (stat. )+0.18/-0.12(syst.).
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
Article (author)
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Caricamento pubblicazioni consigliate

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/176361
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 39
  • ???jsp.display-item.citation.isi??? 37
social impact