Study of the B0 sB0 s oscillation frequency using D- s ?+ combinations in Z decays

Damir Buskulic,I. De Bonis,D. D��camp,Ph Ghez,Corinne B. Goy, Jean Pierre Lees,Arnaud Lucotte,Marie Noelle Minard,Philippe Odier,Bolek Pietrzyk,M. P. Casado,Mokhtar A. Chmeissani,Jos�� M. Crespo,Manuel C. Delf��no,Ilias Efthymiopoulos,Enrique Fern��ndez,M. Fernandez-Bosman,LI I. Garrido,Aurelio Juste,Mauricio C. Mart��nez,S. Orteu,Alberto J. Pacheco,Crist��bal Padilla,Anna Pascual,Josep Antoni Perlas,Imma Riu,Federico A. S��nchez,Frederic Teubert,Anna Colaleo,Donato Creanza,Mauro De Palma,G. Gelao,Maria Girone,Giuseppe Iaselli,Giorgio Pietro Maggi,Marcello Maggi,Nancy Marinelli,Salvatore Nuzzo,Antonio Ranieri,Giuseppe Raso,Federico Ruggier��,G. Selvaggi,Lucia Silvestris,Piergiulio Tempesta,Giuseppe Zito,Xiuping Hu��ng,Jim Lin,Qun Ouyang,Taijie Wang,Yuguang Xie,Rui Xu,Shengtian Xue,Jian Zhang,Lei Zhang,Wei Zhao,Ricard Alemany,Andrew O. Bazarko,Giovanni Bonvicini,Marco Cattaneo,Pere Comas,Paschal A. Coyle,Hans Drevermann,Roger W. Forty,Markus J. Frank,R. Hagelberg,Jeffrey A. Harvey,Patrick Janot,Beat Jost,Emmerich Kneringer,J��rgen Knobloch,I. Lehraus,G. Lutters,Ed B. Martin,Pere Mat��, A. Minten,Ramon Miquel,Ll M. Mir,Lorenzo Moneta,T. Oest,J. R. Pater,Jean Fran?ois Pusztaszeri,Florence Ranjard,Paul E. Rensing,Luigi Rolandi,Dieter Schlatter,Michael Schmelling,Olivier Schneider,W. Tejessv,I. R. Tomalin,Andrea Venturi,H. W. Wachsmuth,Albrecht P. Wagner,Tony Wildish,Zeina J. Ajaltouni,A. Barr��s,Ch F. Boyer,A. Falvard,Pascal Gay,C. J. Guicheney,Pierre Henrard,J. C. Jousset,B. Michel,St��phane Monteil,J. C. Montret,Dominique Pallin,Pascal Perret, F. Podlyski,J. Proriol,J. M. Rossignol,T. A. Fearnley,J?rgen Beck Hansen,Jakob Dines Hansen,John Renner Hansen,Philip H. Hansen,Bj?rn S. Nilsson,Anders W??n?nen, A. Kyriakis,Christos T. Markou,E. Simopoulou,Ion Siotis,A. Vavaki,K. Zachariadou,Alain P. Blondel,G. R. Bonne?aud,Jean Claude Brient,P. Bourdon,Andr�� Roug��,M. Rumpf,Andrea Valassi,Marc Verderi,Henri Videau,D. J. Candling,M. I. Parsons,Ettore Focardi,Giuliano Parrini,M. J. Corden,C. H. Georgiopoulos,David E. Jaffe,Angelo Antonelli,Giorgio Bencivenni,G. F. Bologna,Fabio C. Bossi,Pierluigi L. Campana,G. Capon,David W. Casper,Vitaliano Chiarella,Giuseppe Felici, P. Laurelli,G. P. Mannocchi,Fabrizio Murtas,G. P. Murtas,L. Passalacqua,M. Pepe Altarelli,Lorenzo J. Curtis,SJ J. Dorris,A. W. Halley,Ian G. Knowles,James G R Lynch,Val O'Shea,Colin Raine,P. I. Reeves,J. Michael Scarr,Kenway M. Smith,A. Stan Thompson,F. Thomson,S. Thorn,R. M. Turnbull,Ulrich J. Becker,Chr C. Geweniger,G. Graefe,Paul A. Hanke,G. Hansper,Volker Hepp,E. E. Kluge,Alois Putzer,B. Rensch,Michael G. Schmidt,J. Sommer, H. Stenzel,K. Tittel,Sebastian Werner,Martin Wunsch,Duccio Abbaneo,R. Beuselinck,David M. Binnie,W. Cameron,RJ Dornan, A. Moutoussi,Jordan A. Nash,J. K. Sedgbeer,A. M. Stacey,Michael D. Williams,G��nther Dissertori,P. Girtler, D. Kuhn,Gerald Rudolph,A. P. Betteridge,Chris K. Bowdery,P. Colrain,Gregory A. Crawford,AJ J. Finch,F. Foster,G. D. Hughes,Terry J. Sloan,M. I. Williams,A. Galla,A. M. Greene,Konrad Kleinkn��cht,G. Quasi,Burkhard Renk,Eric Rohne,Heinz Georg Sander,Peter Van Gemmeren,Ch Zeitnitz,JJ J. Aubert,A. M. Bencheikh,Chafik Benchouk,Alain Bonissent,G. Bujosa,Denis Calvet,John Austin Carr,Cristinel Diaconu,Fran?ois Etienne,Nikos Konstantinidis,Patrice Payre,David Rousseau,Mossadek Talby,A. Sadouki,M. Thulasidas,Karim Trabelsi,Mario Aleppo,Francesco Ragusa,Iris Abt,Ralph W. A?mann,Christian W. Bauer,Walter Blum,Hans Dietl,Friedrich Dydak,Gerardo Ganis,C. Gotzhein,Karl Heinz Jakobs,Hubert Kroha,G. L��tjens, Gerhard J. L��tz,W. E. M?nner,Hans G��nther Moser,Robert H. Richter,A. Rosado-Schlosser,Stefan Schael,Ronald Dean Settles,Henry C J Seywerd,Richard St D Denis, W. Wiedenmann,G��nter K. Wolf,J. Boucrot,Olivier H. Callot,A. Cordier,Michel Davier,L. Duflot,Jean Fran?ois Grivaz,Ph Heusse,Marie Jacquet,Dongwook Kim,Francois L. Le Diberder, Jaques Lefran?ois,A. M. Lutz,Irena Nikolic,HJ Park, I. C. Park,Marie H��l��ne Schune, S. Simion,J. J. Veillet,Ioana Videau,Paolo Azz��rri,Giuseppe Bagliesi,Giovanni Batignani,Stefano Bettarini,Concezio Bozzi,Giovanni Calderini,Massimo Carpinelli,M. A. Ciocci,V. Ci��lli,R. Dell'Orso,Riccardo Fantechi,Isidoro Ferrante,Lorenzo Fo��,Francesco Forti, A. Giassi,Marcello A. Giorgi,Anna Gregorio, F. Ligabue,Alberto Lusiani,PS S. Marrocchesi,Alberto Messineo,Fabrizio Palla,Giuliana A. Rizzo,Giulio Sanguinetti,Andrea Sciab��,Paolo Spagnolo,Jack M. Steinberger,Roberto Tenchini,Guido E. Tonelli,C. Vannini,Piero Giorgio Verdini,John J. Walsh,Grahame A. Blair,L. M. Bryant,Francesco Cerutti,J. T. Chambers,Ya Gao,Martin G. Green,T. Medcalf,Pascal Perrodo,John A. Strong,J. H. von Wimmersperg-Toeller,David R. Botterill, R. W. Clifft,T. R. Edgecock,Stephen J. Haywood,P. D. Maley,PR R. Norton,James C. Thompson,Alison E. Wright,Brigitte Bloch-Devaux,Paul Colas,Sandrine Emery,W. Kozanecki,Eric Lan?on,M. C. Lemaire, E. Locci,B. Marx,Patrice Rodr��guez P��rez, J. Rander,Jean F. Renardy,A. Roussarie,J. P. Sch��ller,J��r?me Schwindling,Adel Trabelsi,Bertrand Vallage,S. N. Black,J. H. Dann,Robert P. Johnson,H. Y. Kim,Alan M. Litke,M. A. McNeil,Gary N. Taylor,C. N. Booth,R. Boswell,Chris A J Brew,Susan L. Cartwright,F. H. Combley,A. Koksal,M. H. Letho,W. M. Newton,J. Reeve,Lee F. Thompson,Armin B?hrer,Siegmund Brandt,Volker B��scher,Glen A. Cowan,Claus Grupen,J. Minguet-Rodriguez,F. Rivera,P. Saraiva,Ludek Smol��k,F. Stephan,Marco Apollonio,Luciano Bosisio,R. Delia Marina,Gianrossano R. Giannini,Benigno Gobbo,G. Musolino,Joe E. Rothberg,Steven R. Wasserbaech,S. R. Armstrong,Leo Bellantoni,Peter Elmer,Zhiyang Feng,D. P S Ferguson,Yongsheng Gao,Sergio Gonz��lez,J. Grahl,T. C. Greening,John L. Harton,OJ J. Hayes,Hongbo Hu,PA A. McNamara,Jane M. Nachtman,W. Orejudos,Yi Pan,Y. Saadi,Michael Schmitt,I. J. Scott,Vivek Sharma,A. M. Walsh,Saulan Wu,Xin Wu,J. M. Yamartino,M. Zheng,Georg Zobernig

Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics（1996）

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摘要

A lower limit on the oscillation frequency of the B0 SB0 S system is obtained from approximately four million hadronic Z decays accumulated using the ALEPH detector at LEP from 1991 to 1995. Leptons are combined with opposite sign D- S candidates reconstructed in seven different decay modes as evidence of semileptonic B0 S decays. Criteria designed to ensure precise proper time reconstruction select 277 D- Sl+ combinations. The initial state of these B0 S candidates is determined using an algorithm optimized to efficiently utilise the tagging information available for each event. The limit at 95% confidence level on the B0 SB0 S oscillation frequency is ��ms > 6.6 ps-1. The same data is used to update the measurement of the B0 S lifetime, ��s = 1.54 +0.14 -0.13, (stat) �� 0.04 (syst) ps.

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