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Search for T and CP violation in $B^0-\bar B^0$ mixing with inclusive dilepton events

By B. Aubert, D. Boutigny, J.M. Gaillard, A. Hicheur, Y. Karyotakis, J.P. Lees, P. Robbe, V. Tisserand, A. Zghiche, 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, D.N. Brown, J. Button-Shafer, R.N. Cahn, 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, 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, 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, S. 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. Schalk, R.E. Schmitz, B.A. Schumm, A. Seiden, M. Turri, W. Walkowiak, 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, S. Yang, R.Y. Zhu, S. Devmal, S. Jayatilleke, G. Mancinelli, B.T. Meadows, M.D. Sokoloff, T. Barillari, P. Bloom, W.T. Ford, U. Nauenberg, A. Olivas, P. Rankin, J. Roy, J.G. Smith, W.C. Van Hoek, L. Zhang, 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, 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, C. Thiebaux, G. Vasileiadis, M. Verderi, A. Anjomshoaa, R. Bernet, A. Khan, D. Lavin, F. Muheim, S. Playfer, 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, 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, J. Yi, G. Grosdidier, A. Hocker, H.M. Lacker, S. Laplace, F. Le Diberder, V. Lepeltier, A.M. Lutz, Stéphane Plaszczynski, M.H. Schune, S. Trincaz-Duvoid, G. Wormser, R.M. Bionta, V. Brigljevic, 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, G.W. Morton, J.A. Nash, D. Smith, J.J. Back, G. Bellodi, P. Dixon, P.F. Harrison, R.J.L. Potter, P. Strother, P.B. Vidal, G. Cowan, S. George, M.G. Green, A. Kurup, C.E. Marker, 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, 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, M. Milek, P.M. Patel, F. Palombo, J.M. Bauer, L. Cremaldi, V. Eschenburg, R. Kroeger, J. Reidy, D.A. Sanders, D.J. Summers, C. Hast, J.Y. Nief, P. Taras, 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, R. Stroili, E. Torassa, C. Voci, Maurice. Benayoun, H. Briand, J. Chauveau, P. David, C. De La Vaissiere, L. Del Buono, O. Hamon, P. Leruste, J. Ocariz, M. Pivk, L. Roos, 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, K. Paick, L. Turnbull, D.E. Wagoner, J. Albert, C. Lu, V. Miftakov, S.F. Schaffner, A.J.S. Smith, A. Tumanov, E.W. Varnes, G. Cavoto, D. Del Re, R. Faccini, F. Ferrarotto, F. Ferroni, M.A. Mazzoni, S. Morganti, G. Piredda, M. Serra, C. Voena, S. Christ, 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, M. Langer, G.W. London, B. Mayer, B. Serfass, G. Vasseur, Ch. Yeche, 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, R.C. Field, T. Glanzman, S.J. Gowdy, T. Haas, V. Halyo, T. Himel, T. Hrynova, W.R. Innes, C.P. Jessop, M.H. Kelsey, P. Kim, M.L. Kocian, U. Langenegger, S. Luitz, V. Luth, H.L. Lynch, H. Marsiske, S. Menke, R. Messner, 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. Vavra, M. Weaver, 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, I. Kitayama, X.C. Lou, F. Bianchi, M. Bona, D. Gamba, L. Bosisio, G. 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, M. Datta, 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 and H. Neal

Abstract

We report the results of a search for T and CP violation in B0-anti-B0 mixing using an inclusive dilepton sample collected by the BaBar experiment at the PEP-II B Factory. The asymmetry between (l+,l+) and (l-,l-) events allows us to compare the probabilities P(anti-B0 -> B0) and P(B0 -> anti-B0) oscillations and thus probe T and CP invariance. Using a sample of 23 million B-anti-B pairs, we measure a same-sign dilepton asymmetry of A_(T/CP)=(0.5 +- 1.2(stat) +- 1.4(syst))%. For the modulus of the ratio of complex mixing parameters p and q, we obtain |q/p| = 0.998 +- 0.006(stat) +- 0.007(syst)

Topics: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: 'American Physical Society (APS)'
Year: 2002
OAI identifier: oai:HAL:in2p3-00011534v1
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