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Study of B0s oscillations and lifetime using fully reconstructed D̄s decays

  • R. Barate
  • , D. Buskulic
  • , D. Decamp
  • , P. Ghez
  • , C. Goy
  • , J. P. Lees
  • , A. Lucotte
  • , M. N. Minard
  • , J. Y. Nief
  • , B. Pietrzyk
  • , G. Boix
  • , M. P. Casado
  • , M. Chmeissani
  • , J. M. Crespo
  • , M. Delfino
  • , E. Fernandez
  • , M. Fernandez-Bosman
  • , L. Garrido
  • , E. Graugès
  • , A. Juste
  • M. Martinez, G. Merino, R. Miquel, L. M. Mir, I. C. Park, A. Pascual, J. A. Perlas, I. Riu, F. Sanchez, A. Colaleo, D. Creanza, M. dePalma, G. Gelao, G. Iaselli, G. Maggi, M. Maggi, S. Nuzzo, A. Ranieri, G. Raso, F. Ruggieri, G. Selvaggi, L. Silvestris, P. Tempesta, A. Tricomi, G. Zito, X. Huang, J. Lin, Q. Ouyang, T. Wang, Y. Xie, R. Xu, S. Xue, J. Zhang, L. Zhang, W. Zhao, D. Abbaneo, R. Alemany, U. Becker, P. Bright-Thomas, D. Casper, M. Cattaneo, F. Cerutti, V. Ciulli, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, R. Hagelberg, J. B. Hansen, J. Harvey, P. Janot, B. Jost, I. Lehraus, P. Mato, A. Minten, L. Moneta, A. Pacheco, J. F. Pusztaszeri, F. Ranjard, L. Rolandi, D. Rousseau, D. Schlatter, M. Schmitt, O. Schneider, W. Tejessy, F. Teubert, I. R. Tomalin, H. Wachsmuth, A. Wagner, Z. Ajaltouni, F. Badaud, G. Chazelle, O. Deschamps, A. Falvard, C. Ferdi, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. C. Montret, D. Pallin, P. Perret, F. Podlyski, J. Proriol, P. Rosnet, T. Fearnley, J. D. Hansen, J. R. Hansen, P. H. Hansen, B. S. Nilsson, B. Rensch, A. Wäänänen, G. Daskalakis, A. Kyriakis, C. Markou, E. Simopoulou, I. Siotis, A. Vayaki, A. Blondel, G. Bonneaud, J. C. Brient, P. Bourdon, A. Rougé, M. Rumpf, A. Valassi, M. Verderi, H. Videau, T. Boccali, E. Focardi, G. Parrini, K. Zachariadou, M. Corden, C. Georgiopoulos, D. E. Jaffe, A. Antonelli, G. Bencivenni, G. Bologna, F. Bossi, P. Campana, G. Capon, V. Chiarella, G. Felici, P. Laurelli, G. Mannocchi, F. Murtas, G. P. Murtas, L. Passalacqua, M. Pepe-Altarelli, L. Curtis, S. J. Dorris, A. W. Halley, J. G. Lynch, P. Negus, V. O'Shea, C. Raine, J. M. Scarr, K. Smith, P. Teixeira-Dias, A. S. Thompson, E. Thomson, F. Thomson, O. Buchmäller, S. Dhamotharan, C. Geweniger, G. Graefe, P. Hanke, G. Hansper, V. Hepp, E. E. Kluge, A. Putzer, J. Sommer, K. Tittel, S. Werner, M. Wunsch, R. Beuselinck, D. M. Binnie, W. Cameron, P. J. Dornan, M. Girone, S. Goodsir, E. B. Martin, N. Marinelli, A. Moutoussi, J. Nash, J. K. Sedgbeer, P. Spagnolo, M. D. Williams, V. M. Ghete, P. Girtler, E. Kneringer, D. Kuhn, G. Rudolph, A. P. Betteridge, C. K. Bowdery, P. G. Buck, P. Colrain, G. Crawford, A. J. Finch, F. Foster, G. Hughes, R. W.L. Jones, M. I. Williams, I. Giehl, A. M. Greene, C. Hoffmann, K. Jakobs, K. Kleinknecht, G. Quast, B. Renk, E. Rohne, H. G. Sander, P. van Gemmeren, C. Zeitnitz, J. J. Aubert, C. Benchouk, A. Bonissent, G. Bujosa, J. Carr, P. Coyle, F. Etienne, O. Leroy, F. Motsch, P. Payre, M. Talby, A. Sadouki, M. Thulasidas, K. Trabelsi, M. Aleppo, M. Antonelli, F. Ragusa, R. Berlich, W. Blum, V. Bäscher, H. Dietl, G. Ganis, C. Gotzhein, H. Kroha, G. Lutjens, G. Lutz, C. Mannert, W. Mäanner, H. G. Moser, R. Richter, A. Rosado-Schlosser, S. Schael, R. Settles, H. Seywerd, H. Stenzel, W. Wiedenmann, G. Wolf, J. Boucrot, O. Callot, S. Chen, Y. Choi, A. Cordier, M. Davier, L. Duflot, J. F. Grivaz, P. Heusse, A. Häcker, A. Jacholkowska, D. W. Kim, F. Le Diberder, J. Lefrançois, A. M. Lutz, I. Nikolic, M. H. Schune, E. Tournefier, J. J. Veillet, I. Videau, D. Zerwas, P. Azzurri, G. Bagliesi, G. Batignani, S. Bettarini, C. Bozzi, G. Calderini, M. Carpinelli, M. A. Ciocci, R. Dell'Orso, R. Fantechi, I. Ferrante, L. Foà, F. Forti, A. Giassi, M. A. Giorgi, A. Gregorio, F. Ligabue, A. Lusiani, P. S. Marrocchesi, A. Messineo, F. Palla, G. Rizzo, G. Sanguinetti, A. Sciabà, J. Steinberger, R. Tenchini, G. Tonelli, C. Vannini, A. Venturi, P. G. Verdini, G. A. Blair, L. M. Bryant, J. T. Chambers, M. G. Green, T. Medcalf, P. Perrodo, J. A. Strong, J. H. von Wimmersperg-Toeller, D. R. Botterill, R. W. Clifft, T. R. Edgecock, S. Haywood, P. R. Norton, J. C. Thompson, A. E. Wright, B. Bloch-Devaux, P. Colas, S. Emery, W. Kozanecki, E. Lançon, M. C. Lemaire, E. Locci, P. Perez, J. Rander, J. F. Renardy, A. Roussarie, J. P. Schuller, J. Schwindling, A. Trabelsi, B. Vallage, S. N. Black, J. H. Dann, R. P. Johnson, H. Y. Kim, N. Konstantinidis, A. M. Litke, M. A. McNeil, G. Taylor, C. N. Booth, C. A.J. Brew, S. Cartwright, F. Combley, M. S. Kelly, M. Lehto, J. Reeve, L. F. Thompson, K. Affholderbach, A. Bährer, S. Brandt, G. Cowan, C. Grupen, P. Saraiva, L. Smolik, F. Stephan, M. Apollonio, L. Bosisio, R. della Marina, G. Giannini, B. Gobbo, G. Musolino, J. Rothberg, S. Wasserbaech, S. R. Armstrong, E. Charles, P. Elmer, D. P.S. Ferguson, Y. Gao, S. Gonzalez, T. C. Greening, O. J. Hayes, H. Hu, S. Jin, P. A. McNamara, J. M. Nachtman, J. Nielsen, W. Orejudos, Y. B. Pan, Y. Saadi, I. J. Scott, J. Walsh, S. L. Wu, X. Wu, J. M. Yamartino, G. Zobernig
  • Université Paris-Sud
  • University of São Paulo
  • University of Barcelona
  • INFN Sezione di Bari
  • INFN Sezione di Catania
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • European Organization for Nuclear Research
  • University of Geneva
  • Cornell University College of Engineering
  • Schweizerischer Bankverein
  • Université Blaise Pascal
  • Niels Bohr Institutet
  • NCSR Demokritos
  • University of Florence
  • Florida State University
  • LNF-INFN
  • University of Turin
  • Ev-K2-CNR Committee
  • University of Glasgow
  • University of Heidelberg
  • Imperial College London
  • University of Innsbruck
  • Lancaster University
  • Johannes Gutenberg University
  • Sezione INFN di Milano
  • Max-Planck-Institut für Physik
  • Laboratoire de l'Accélérateur Linéaire
  • Sungkyunkwan University
  • Gangneung-Wonju National University
  • University of Pisa
  • Dipartimento di Scienze Biomediche
  • Royal Holloway University of London
  • Rutherford Appleton Laboratory
  • Institut Pierre Simon Laplace, CNRS and CEA
  • University of California at Santa Cruz
  • The University of Sheffield
  • Universität Siegen
  • University of Trieste
  • University of Washington
  • University of Wisconsin-Madison
  • University of California, Los Angeles

Research output: Contribution to journalArticlepeer-review

Abstract

A search for B0s oscillations is performed using approximately 4 million Z → qq̄ events collected by the ALEPH experiment during 1991-1995. B0s candidates are partially reconstructed by combining tracks with fully reconstructed D-s candidates. The B0s production flavour is estimated from the sign of the opposite hemisphere charge, a fragmentation kaon in the same hemisphere, or a lepton in the opposite hemisphere. From a total sample of 1620 candidates, with a B0s purity estimated to be 22%, all values of Δms below 3.9 ps-1 and between 6.5 and 8.8 ps-1 are excluded at 95% CL. From the same sample, the B0s lifetime is measured to be τs = 1.47 ± 0.14(stat) ± 0.08(syst) ps. This analysis selects mainly hadronic B0s decays and is statiscally independent of a previous ALEPH analysis selecting B0s → D(*)-s+ v candidates. Combining these two analyses yields Δms > 7.9 ps-1 at 95% CL and τs = 1.51 ± 0.11 ps.

Original languageEnglish
Pages (from-to)367-385
Number of pages19
JournalEuropean Physical Journal C
Volume4
Issue number3
DOIs
Publication statusPublished - 1 Jan 1998

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