Results on B0-BBAR0 mixing in e+e- annihilation at LEP are reported. A new method is used, where the charge of one b quark is tagged by a high-p, high-p(perpendicular-to) electron or muon, and the charge of the other is extracted from the momentum-weighted average of the charges of jet fragments. Based on the analysis of 180000 hadronic Z decays produced in the ALEPH detector, f(d-chi-d) + 0.72f(s-chi-s) = 0.113 +/- 0.018 (stat.) +/- 0.027 (syst.) is obtained. Combining this result with the ALEPH dilepton measurement yields chi = 0.129 +/- 0.022.

Measurement of B-(B)bar mixing at the Z using a jet-charge method / D. Buskulic, D. Decamp, C. Goy, J. Lees, M. Minard, B. Mours, R. Alemany, F. Ariztizabal, P. Comas, J. Crespo, M. Delfino, E. Fernandez, V. Gaitan, L. Garrido, L. Mir, A. Pacheco, 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. Gao, H. Hu, D. Huang, X. Huang, J. Lin, J. Lou, C. Qiao, T. Wang, Y. Xie, D. Xu, R. Xu, J. Zhang, W. Zhao, W. Atwood, L. Bauerdick, E. Blucher, G. Bonvicini, F. Bossi, J. Boudreau, T. Burnett, H. Drevermann, R. Forty, R. Hagelberg, S. Haywood, J. Hilgart, R. Jacobsen, B. Jost, J. Knobloch, E. Lancon, I. Lehraus, T. Lohse, A. Lusiani, M. Martinez, P. Mato, T. Mattison, H. Meinhard, S. Menary, T. Meyer, A. Minten, A. Miotto, R. Miquel, H. Moser, J. Nash, P. Palazzi, J. Perlas, F. Ranjard, G. Redlinger, L. Rolandi, A. Roth, 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, A. Bencheikh, R. Elfellous, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, J. Montret, D. Pallin, P. Perret, B. Pietrzyk, J. Proriol, F. Prulhiere, G. Stimpfl, 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, A. Gamess, J. Harvey, S. Orteu, A. Rosowsky, A. Rouge, M. Rumpf, R. Tanaka, 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, 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, B. Altoon, O. Boyle, P. Colrain, I. Tenhave, J. Lynch, W. Maitland, W. Morton, C. Raine, J. Scarr, K. Smith, A. Thompson, R. Turnbull, B. Brandl, O. Braun, R. Geiges, 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, S. Patton, D. Payne, M. Phillips, J. Sedgbeer, G. Taylor, I. Tomalin, A. Wright, P. Girtler, 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, T. Barczewski, K. Kleinknecht, J. Raab, B. Renk, S. Roehn, H. Sander, H. Schmidt, F. Steeg, S. Walther, B. Wolf, J. Aubert, C. Benchouk, V. Bernard, A. Bonissent, J. Carr, P. Coyle, J. Drinkard, F. Etienne, S. Papalexiou, P. Payre, Z. Qian, D. Rousseau, P. Schwemling, M. Talby, S. Adlung, H. Becker, W. Blum, D. Brown, P. Cattaneo, G. Cowan, B. Dehning, H. Dietl, F. Dydak, M. Fernandezbosman, M. Frank, A. Halley, T. Hanslkozanecka, J. Lauber, G. Lutjens, G. Lutz, W. Manner, Y. Pan, R. Richter, H. Rotscheidt, J. Schroder, A. Schwarz, R. Settles, U. Stierlin, U. Stiegler, R. Stdenis, M. Takashima, J. Thomas, G. Wolf, V. Bertin, J. Boucrot, O. Callot, X. Chen, A. Cordier, M. Davier, J. Grivaz, P. Heusse, P. Janot, D. Kim, F. Lediberder, J. Lefrancois, A. Lutz, M. Schune, J. Veillet, I. Videau, Z. Zhang, F. Zomer, D. Abbaneo, S. Amendolia, G. Bagliesi, G. Batignani, L. Bosisio, U. Bottigli, C. Bradaschia, M. Carpinelli, M. Ciocci, R. Dellorso, I. Ferrante, F. Fidecaro, L. Foa, E. Focardi, F. Forti, A. Giassi, M. Giorgi, F. Ligabue, E. Mannelli, P. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, J. Steinberger, R. Tenchini, G. Tonelli, G. Triggiani, C. Vannini, A. Venturi, P. Verdini, J. Walsh, J. Carter, M. Green, P. March, 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, W. Kozanecki, M. Lemaire, E. Locci, S. Loucatos, E. Monnier, P. Perez, F. Perrier, J. Rander, J. Renardy, A. Roussarie, J. Schuller, J. Schwindling, D. Simohand, B. Vallage, R. Johnson, A. Litke, J. Wear, J. Ashman, W. Babbage, C. Booth, C. Buttar, R. Carney, S. Cartwright, F. Combley, F. Hatfield, P. Reeves, L. Thompson, E. Barberio, S. Brandt, C. Grupen, L. Mirabito, U. Schafer, H. Seywerd, G. Ganis, G. Giannini, B. Gobbo, F. Ragusa, L. Bellantoni, 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, Y. Tang, A. Walsh, F. Weber, M. Whitney, S. Wu, X. Wu, G. Zobernig. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 284:1/2(1992), pp. 177-190.

Measurement of B-(B)bar mixing at the Z using a jet-charge method

F. Ragusa;
1992

Abstract

Results on B0-BBAR0 mixing in e+e- annihilation at LEP are reported. A new method is used, where the charge of one b quark is tagged by a high-p, high-p(perpendicular-to) electron or muon, and the charge of the other is extracted from the momentum-weighted average of the charges of jet fragments. Based on the analysis of 180000 hadronic Z decays produced in the ALEPH detector, f(d-chi-d) + 0.72f(s-chi-s) = 0.113 +/- 0.018 (stat.) +/- 0.027 (syst.) is obtained. Combining this result with the ALEPH dilepton measurement yields chi = 0.129 +/- 0.022.
Settore FIS/01 - Fisica Sperimentale
Settore FIS/04 - Fisica Nucleare e Subnucleare
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/175486
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