| Autor: |
J. Colas, D. Linglin, L. Villasenor, T. Bacon, H. Faissner, J. Vrana, Veikko Karimäki, W. Ruhm, G.T.J. Arnison, J. R. Batley, I. F. Fensome, P. Flynn, Randall Sobie, M. Yvert, P. Sphicas, L. Zanello, A. Norton, N. Bains, Stephen Wimpenny, Pierluigi Zotto, A. Astbury, G. Bauer, J. Dorenbosch, A. Savoy-Navarro, M.-N. Minard, D. Schinzel, M. Mohammadi, E. Pietarinen, Daniel Denegri, G. Piano Mortari, C. Ghesquiere, Ritva Kinnunen, G. Sajot, W.R. Gibson, W. G. Scott, S. Li, B. Mours, D. Pitman, C. Cochet, G. Maurin, J. P. Debrion, H. G. Moser, A. Placci, M.J. Corden, S. J. Haywood, I. Wingerter, Paul Kyberd, Hans Reithler, G. Ciapetti, D. Gee, M. Pimiä, D. Clarke, J. D. Dowell, John A Coughlan, E. Radermacher, R. Edgecock, L. Dobrzynski, Tejinder Virdee, R. Frey, Francesco Lacava, M. Ikeda, J.P. Vialle, A. Schwartz, A. Bezaguet, L. Naumann, C. Perault, Paolo Rossi, M. Debeer, O. C. Allkofer, Felicitas Pauss, A. Diciaccio, M. Markytan, K. Morgan, I. Siotis, C. Pigot, E. Tscheslog, Daniel J. Smith, E. Petrolo, M. Moricca, J. P. Revol, M. Degiorgi, I. Zacharov, D. Pascoli, Filippo Ceradini, John Wilson, T. Meyer, S. Tether, C. Markou, P. I. P. Kalmus, G. Jorat, I. Sheer, W.J. Haynes, T. Axon, Jeffrey Richman, A. Geiser, Christopher Seez, J. Kroll, Alessandro Bettini, Paolo Giacomelli, I. R. Kenyon, G. Thompson, D. Samyn, T. Redelberger, J. Streets, Ehud Duchovni, Michael Albrow, Richard Keeler, G. Fontaine, J. P. Porte, C.-E. Wulz, A. Taurok, Elizabeth Locci, S. Levegrün, M. Jimack, S. Beingessner, Claudia J. Stubenrauch, J. Sass, J. P. Mendiburu, A. Gonidec, J. P. Laugier, G. Salvini, B. Van Eijk, Peter Watkins, G. Busetto, K. Sumorok, Carmen Albajar, L. Gately, E. Eisenhandler, D. Summers, K. Wacker, P. Petta, R. J. Homer, P. Erhard, Th. Müller, David B. Cline, W. Jank, Margret Fincke-Keeler, V. Vuillemin, C. Rubbia, Y. Giraud-Héraud, H. F. Hoffmann, B. Aubert, D. J. Holthuizen, G.H. Grayer, I. ten Have, J. P. Merlo, Manfred Krammer, Anna Teresa Meneguzzo, Dave Charlton, T. Wyatt, T. P. Shah, X. Wu, J. P. Lees, H. D. Wahl, G. Cox, F. Ghio, W. Kienzle, Kenneth Long, D. Robinson, S. Centro, A. Wildish, J. N. Bellinger, T. Markiewicz, N. Zaganidis, Jorma Tuominiemi, M. Demoulin, H. von der Schmitt, Charling Tao, J. Garvey, D. Dau, M. Della Negra, R. Leuchs, J. Rohlf, S. Geer, A. Honma, P. Ghez, P. Cennini, C. Bacci, Josef Strauss, K. Eggert, R. Frühwirth, G. Bunce, P. Nedelec, Akram Khan, P. Colas, Nicolas Ellis, H. Grassmann, D. Kryn, Alain Givernaud, A. Kernan, K. Bos, E. Buckley, Sergio Cittolin, Asoke K. Nandi, F. Szoncso, W. von Schlippe, C. Zaccardelli, Bruce Denby, P. Catz |
| Rok vydání: |
1987 |
| Předmět: |
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| Zdroj: |
Physics Letters B. 186:247-254 |
| ISSN: |
0370-2693 |
| DOI: |
10.1016/0370-2693(87)90288-7 |
| Popis: |
We report on a search for B0↔B¯0 oscillations (mixing) using events with two identified muons from data collected at the CERN p¯p collider. In the absence of B0↔B¯0 oscillations, dimuons coming directly from decays of beauty-antibeauty paris must have opposite signs. Like-sign dimuons are expected from events where one muon arises from beauty decay and the other from the charm decay of the associated beauty-charm cascade. Taking these processes into account, together with the contribution from charm production, the predicted ratio of like-sign to unlike-sign muon pairs is 0.26±0.03. Experimentally we measure 0.42±0.07±0.03. A natural explanation for the excess of like-sign events is the existence of a significant amount of B0↔B¯0 transitions. The fraction of beauty particles that produce first-generation decay muons with the opposite electric charge from that expected without mixing is deduced to be: χ = 0.121±0.047. Combined with the null result from searches for B0↔B¯0 oscillations at e+e− colliders, our results are consistent with transitions inthe B0s system, as favoured theoretically. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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