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Study of time-dependent CP-violating asymmetries and flavor oscillations in neutral B decays at the γ (4S)

  • B. Aubert
  • , D. Boutigny
  • , J. M. Gaillard
  • , A. Hicheur
  • , Y. Karyotakis
  • , J. P. Lees
  • , P. Robbe
  • , V. Tisserand
  • , A. Palano
  • , A. Pompili
  • , G. P. Chen
  • , J. C. Chen
  • , N. D. Qi
  • , G. Rong
  • , P. Wang
  • , Y. S. Zhu
  • , G. Eigen
  • , B. Stugu
  • , G. S. Abrams
  • , A. W. Borgland
  • A. B. Breon, D. N. Brown, J. Button-Shafer, R. N. Cahn, A. R. Clark, M. S. Gill, A. V. Gritsan, Y. Groysman, R. G. Jacobsen, R. W. Kadel, J. Kadyk, L. T. Kerth, Yu G. Kolomensky, J. F. Kral, C. Leclerc, M. E. Levi, G. Lynch, P. J. Oddone, M. Pripstein, N. A. Roe, A. Romosan, M. T. Ronan, V. G. Shelkov, A. V. Telnov, W. A. Wenzel, T. J. Harrison, C. M. Hawkes, D. J. Knowles, S. W. O’neale, R. C. Penny, A. T. Watson, N. K. Watson, T. Deppermann, K. Goetzen, H. Koch, M. Kunze, B. Lewandowski, K. Peters, H. Schmuecker, M. Steinke, N. R. Barlow, W. Bhimji, N. Chevalier, P. J. Clark, W. N. Cottingham, B. Foster, C. Mackay, F. F. Wilson, K. Abe, C. Hearty, T. S. Mattison, J. A. McKenna, D. Thiessen, S. Jolly, A. K. McKemey, V. E. Blinov, A. D. Bukin, D. A. Bukin, A. R. Buzykaev, V. B. Golubev, V. N. Ivanchenko, A. A. Korol, E. A. Kravchenko, A. P. Onuchin, S. I. Serednyakov, Yu I. Skovpen, V. I. Telnov, A. N. Yushkov, D. Best, M. Chao, D. Kirkby, A. J. Lankford, M. Mandelkern, S. McMahon, D. P. Stoker, K. Arisaka, C. Buchanan, S. Chun, D. B. Macfarlane, S. Prell, Sh Rahatlou, G. Raven, V. Sharma, C. Campagnari, B. Dahmes, P. A. Hart, N. Kuznetsova, S. L. Levy, O. Long, A. Lu, M. A. Mazur, J. D. Richman, W. Verkerke, J. Beringer, A. M. Eisner, M. Grothe, C. A. Heusch, W. S. Lockman, T. Pulliam, T. Schalk, R. E. Schmitz, B. A. Schumm, A. Seiden, M. Turri, W. Walkowiak, D. C. Williams, M. G. Wilson, E. Chen, G. P. Dubois-Felsmann, A. Dvoretskii, D. G. Hitlin, S. Metzler, J. Oyang, F. C. Porter, A. Ryd, A. Samuel, M. Weaver, S. Yang, R. Y. Zhu, S. Devmal, T. L. Geld, S. Jayatilleke, G. Mancinelli, B. T. Meadows, M. D. Sokoloff, T. Barillari, P. Bloom, M. O. Dima, W. T. Ford, U. Nauenberg, A. Olivas, P. Rankin, J. Roy, J. G. Smith, W. C. van Hoek, J. Blouw, J. L. Harton, M. Krishnamurthy, A. Soffer, W. H. Toki, R. J. Wilson, J. Zhang, T. Brandt, J. Brose, T. Colberg, M. Dickopp, R. S. Dubitzky, A. Hauke, E. Maly, R. Müller-Pfefferkorn, S. Otto, K. R. Schubert, R. Schwierz, B. Spaan, L. Wilden, D. Bernard, G. R. Bonneaud, F. Brochard, J. Cohen-Tanugi, S. Ferrag, S. T’jampens, Ch Thiebaux, G. Vasileiadis, M. Verderi, A. Anjomshoaa, R. Bernet, A. Khan, D. Lavin, F. Muheim, S. Playfer, J. E. Swain, J. Tinslay, M. Falbo, C. Borean, C. Bozzi, L. Piemontese, E. Treadwell, F. Anulli, R. Baldini-Ferroli, A. Calcaterra, R. de Sangro, D. Falciai, G. Finocchiaro, P. Patteri, I. M. Peruzzi, M. Piccolo, Y. Xie, A. Zallo, S. Bagnasco, A. Buzzo, R. Contri, G. Crosetti, M. Lo Vetere, M. Macri, M. R. Monge, S. Passaggio, F. C. Pastore, C. Patrignani, M. G. Pia, E. Robutti, A. Santroni, S. Tosi, M. Morii, R. Bartoldus, R. Hamilton, U. Mallik, J. Cochran, H. B. Crawley, P. A. Fischer, J. Lamsa, W. T. Meyer, E. I. Rosenberg, G. Grosdidier, C. Hast, A. Höcker, H. M. Lacker, S. Laplace, V. Lepeltier, A. M. Lutz, S. Plaszczynski, M. H. Schune, S. Trincaz-Duvoid, G. Wormser, R. M. Bionta, V. Brigljević, D. J. Lange, M. Mugge, K. van Bibber, D. M. Wright, A. J. Bevan, J. R. Fry, E. Gabathuler, R. Gamet, M. George, M. Kay, D. J. Payne, R. J. Sloane, C. Touramanis, M. L. Aspinwall, D. A. Bowerman, P. D. Dauncey, U. Egede, I. Eschrich, N. J.W. Gunawardane, J. A. Nash, P. Sanders, D. Smith, D. E. Azzopardi, J. J. Back, G. Bellodi, P. Dixon, P. F. Harrison, R. J.L. Potter, H. W. Shorthouse, P. Strother, P. B. Vidal, G. Cowan, S. George, M. G. Green, A. Kurup, C. E. Marker, P. McGrath, T. R. McMahon, S. Ricciardi, F. Salvatore, G. Vaitsas, D. Brown, C. L. Davis, J. Allison, R. J. Barlow, J. T. Boyd, A. C. Forti, J. Fullwood, F. Jackson, G. D. Lafferty, N. Savvas, J. H. Weatherall, J. C. Williams, A. Farbin, A. Jawahery, V. Lillard, J. Olsen, D. A. Roberts, J. R. Schieck, G. Blaylock, C. Dallapiccola, K. T. Flood, S. S. Hertzbach, R. Kofler, V. B. Koptchev, T. B. Moore, H. Staengle, S. Willocq, B. Brau, R. Cowan, G. Sciolla, F. Taylor, R. K. Yamamoto, M. Milek, P. M. Patel, F. Palombo, J. M. Bauer, L. Cremaldi, V. Eschenburg, R. Kroeger, J. Reidy, D. A. Sanders, D. J. Summers, J. Y. Nief, P. Taras, H. Nicholson, C. Cartaro, N. Cavallo, G. De Nardo, F. Fabozzi, C. Gatto, L. Lista, P. Paolucci, D. Piccolo, C. Sciacca, J. M. Losecco, J. R.G. Alsmiller, T. A. Gabriel, J. Brau, R. Frey, E. Grauges, M. Iwasaki, N. B. Sinev, D. Strom, F. Colecchia, F. Dal Corso, A. Dorigo, F. Galeazzi, M. Margoni, G. Michelon, M. Morandin, M. Posocco, M. Rotondo, F. Simonetto, R. Stroili, E. Torassa, C. Voci, M. Benayoun, H. Briand, J. Chauveau, P. David, Ch de la Vaissière, L. Del Buono, O. Hamon, F. Le Diberder, Ph Leruste, J. Ocariz, L. Roos, J. Stark, P. F. Manfredi, V. Re, V. Speziali, E. D. Frank, L. Gladney, Q. H. Guo, J. Panetta, C. Angelini, G. Batignani, S. Bettarini, M. Bondioli, F. Bucci, E. Campagna, M. Carpinelli, F. Forti, M. A. Giorgi, A. Lusiani, G. Marchiori, F. Martinez-Vidal, M. Morganti, N. Neri, E. Paoloni, M. Rama, G. Rizzo, F. Sandrelli, G. Simi, G. Triggiani, J. Walsh, M. Haire, D. Judd, K. Paick, L. Turnbull, D. E. Wagoner, J. Albert, P. Elmer, C. Lu, V. Miftakov, S. F. Schaffner, A. J.S. Smith, A. Tumanov, E. W. Varnes, G. Cavoto, D. Del Re, F. Ferrarotto, F. Ferroni, E. Lamanna, M. A. Mazzoni, S. Morganti, G. Piredda, F. Safai Tehrani, M. Serra, C. Voena, R. Faccini, S. Christ, R. Waldi, T. Adye, N. De Groot, B. Franek, N. I. Geddes, G. P. Gopal, S. M. Xella, R. Aleksan, S. Emery, A. Gaidot, S. F. Ganzhur, P. F. Giraud, G. Hamel de Monchenault, W. Kozanecki, M. Langer, G. W. London, B. Mayer, B. Serfass, G. Vasseur, Ch Yèche, M. Zito, M. V. Purohit, H. Singh, A. W. Weidemann, F. X. Yumiceva, I. Adam, D. Aston, N. Berger, A. M. Boyarski, G. Calderini, M. R. Convery, D. P. Coupal, D. Dong, J. Dorfan, W. Dunwoodie, R. C. Field, T. Glanzman, S. J. Gowdy, T. Haas, V. Halyo, T. Himel, T. Hryn’ova, M. E. Huffer, W. R. Innes, C. P. Jessop, M. H. Kelsey, P. Kim, M. L. Kocian, U. Langenegger, D. W.G.S. Leith, S. Luitz, V. Luth, H. L. Lynch, H. Marsiske, S. Menke, R. Messner, D. R. Muller, C. P. O’grady, V. E. Ozcan, A. Perazzo, M. Perl, S. Petrak, H. Quinn, B. N. Ratcliff, S. H. Robertson, A. Roodman, A. A. Salnikov, T. Schietinger, R. H. Schindler, J. Schwiening, A. Snyder, A. Soha, S. M. Spanier, J. Stelzer, D. Su, M. K. Sullivan, H. A. Tanaka, J. Va’vra, S. R. Wagner, A. J.R. Weinstein, W. J. Wisniewski, D. H. Wright, C. C. Young, P. R. Burchat, C. H. Cheng, T. I. Meyer, C. Roat, R. Henderson, W. Bugg, H. Cohn, J. M. Izen, I. Kitayama, X. C. Lou, F. Bianchi, M. Bona, D. Gamba, L. Bosisio, G. Della Ricca, S. Dittongo, L. Lanceri, P. Poropat, G. Vuagnin, R. S. Panvini, C. M. Brown, P. D. Jackson, R. Kowalewski, J. M. Roney, H. R. Band, E. Charles, S. Dasu, A. M. Eichenbaum, H. Hu, J. R. Johnson, R. Liu, F. Di Lodovico, Y. Pan, R. Prepost, I. J. Scott, S. J. Sekula, J. H. von Wimmersperg-Toeller, S. L. Wu, Z. Yu, T. M.B. Kordich, H. Neal
  • Laboratoire de Physique des Particules
  • Università degli studi di Bari Aldo Moro
  • Institute of High Energy Physics, Chinese Academy of Sciences
  • University of Bergen
  • University of California, Berkeley
  • University of Birmingham
  • Ruhr-University Bochum
  • University of Bristol
  • University of British Columbia
  • Brunel University London
  • Budker Institute of Nuclear Physics of the Siberian Branch of the RAS
  • Long Beach VA and University of California
  • University of California, Los Angeles
  • University of California, San Diego
  • University of California, Santa Barbara
  • University of California at Santa Cruz
  • California Institute of Technology
  • University of Cincinnati
  • University of Colorado Boulder
  • Cooperative Institute for Research in the Atmosphere
  • Technical University Dresden
  • University of Edinburgh
  • Elon University
  • University of Ferrara
  • Florida A and M University
  • LNF-INFN
  • University of Perugia
  • University of Genoa
  • Harvard University
  • University of Iowa
  • Iowa State University
  • Laboratoire de l'Accélérateur Linéaire
  • Lawrence Livermore National Laboratory
  • University of Liverpool
  • University of London
  • Queen Mary University of London
  • Royal Holloway University of London
  • University of Louisville
  • University of Manchester
  • University of Maryland, College Park
  • UMass Amherst
  • Massachusetts Institute of Technology
  • McGill University
  • University of Milano
  • University of Mississippi
  • Universite de Montreal
  • Mount Holyoke College
  • University of Naples Federico II
  • Università degli Studi della Basilicata
  • University of Notre Dame
  • Oak Ridge National Laboratory
  • University of Oregon
  • University of Padova
  • Sorbonne Université
  • University of Pavia
  • University of Pennsylvania
  • University of Pisa
  • Prairie View A and M University
  • Princeton University
  • Dipartimento di Fisica
  • Universität Rostock
  • CCLRC Rutherford Appleton Laboratory
  • Institut Pierre Simon Laplace, CNRS and CEA
  • University of South Carolina
  • Stanford Linear Accelerator Center
  • Stanford University
  • TRIUMF
  • University of Tennessee
  • University of Texas
  • University of Turin
  • University of Trieste
  • Vanderbilt University
  • University of Victoria
  • University of Wisconsin-Madison
  • Yale University

Research output: Contribution to journalArticlepeer-review

177 Citations (Scopus)

Abstract

We present a measurement of time-dependent CP-violating asymmetries in neutral B meson decays collected with the BABAR detector at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. The data sample consists of 29.7 fb-1 recorded at the γ(4S) resonance and 3.9 fb-1 off resonance. One of the neutral B mesons, which are produced in pairs at the γ(4S), is fully reconstructed in the CP decay modes J/ ψKS 0, ψ(2S)KS 0, χc1KS 0, J/ψK*0 (K*0→KS 0π0) and J/ψKL 0, or in flavor-eigenstate modes involving D(*)π/p/a1 and J/ψK*0 (K*0→K+π -). The flavor of the other neutral B meson is tagged at the time of its decay, mainly with the charge of identified leptons and kaons. A neural netsvork tagging algorithm is used to recover events without a clear lepton or kaon tag. The proper time elapsed between the decays is determined by measuring the distance between the decay vertices. Wrong-tag probabilities, the time-difference resolution function, and the B0-B̄0 oscillation frequency Δmd are measured with a sample of about 6350 fully-reconstructed B0 decays in hadronic flavor-eigenstate modes. A maximum-likelihood fit to this flavor eigenstate sample finds Δmd=0.516±0.016(stat)±0.010(syst) ps -1. The value of the asymmetry amplitude sin 2β is determined from a simultaneous maximum-likelihood fit to the time-difference distribution of the flavor-eigenstate sample and about 642 tagged B0 decays in the CP-eigenstate modes. We find sin 2β=0.59 ±0.14(stat)±0. 05(syst), demonstrating that CP violation exists in the neutral B meson system. We also determine the value of the CP violation parameter |λ|=0. 93±0.09(stat)±0.03(syst), which is consistent with the expectation of |λ|=1 for no direct CP violation.

Original languageEnglish
Article number032003
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume66
Issue number3
DOIs
Publication statusPublished - 1 Jan 2002

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