Measurements of branching fractions and time-dependent CP-violating asymmetries in B→η'K decays

Measurements of branching fractions and time-dependent CP-violating asymmetries in B→η'K decays

We present measurements of the B -> eta' K branching fractions:for B+ -> eta' K+ we measure also the time-integrated charge asymmetry Ach, and for B0 -> eta' K0S the time dependent CP-violation parameters S and C. The data sample corresponds to 232 million B Bbar pairs produc...

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Hauptverfasser: Abrams, Gerald S, Ahmed, M, Arnaud, N, Azzolini, V, Brown, David Norvil, Campagnari, C, Carpinelli, M, Cartaro, C, Chaisanguanthum, K. S, Charles, M. J, Chavez, C. A, Cheng, B, Cossutti, F, Crawley, H. B, Dasu, S, Datta, Mousumi, Di Lodovico, F, Dittongo, S, Dong, D, Dorfan, J, Eichenbaum, A. M, Emery, S, Field, R. C, Flaecher, H. U, Foulkes, S. D, Fritsch, Miriam, Fry, J. R, Gaspero, Mario, Gatto, C, Giraud, P. F, Goetzen, K, Grosdidier, G, Harrison, T. J, Hearty, Christopher, Hill, E. J, Innes, Walter R, Judd, D, Kerth, Leroy T, Khan, Akram, Knecht, Neil S, Koeneke, K, Kovalskyi, D, Lafferty, G. D, Lange, D. J, Leith, D. W. G. S, Libby, J, LoSecco, J. M, Lutz, A. M, Lynch, Gerald R, Majewski, S. A, Mattison, Thomas S, McKenna, Janis, Mohanty, G. B, Monorchio, D, Moore, T. B, Morganti, Silvio, Morii, M, Nash, J. A, Negrini, M, Nogowski, R, Palano, Antimo, Parry, R. J, Patel, P. M, Perl, M, Petersen, B. A, Polci, F, Posocco, M, Potter, C. T, Rahatlou, Sh, Raven, G, Richman, J. D, Roat, C, Robertson, S. H, Roe, Nataliea A, Rubin, A. E, Salvatore, F, Schalk, T, Schott, G, Schrenk, S, Schubert, J, Simonetto, F, Skovpen, Yu I, Snyder, A, Soffer, A, Soha, A, Spaan, B, Spanier, S. M, Su, D, Sundermann, J. E, Torrence, E, Wagoner, D. E, Walsh, J, Wang, K, Wappler, F. R, Willocq, Stephane, Wilson, R. J, Yang, S, Yu, Z, Zeng, Q, de Sangro, R
Format: Artikel
Sprache:eng
Schlagworte:
B mesons
CP invariance
Meson hadronic decay
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Zusammenfassung:We present measurements of the B -> eta' K branching fractions:for B+ -> eta' K+ we measure also the time-integrated charge asymmetry Ach, and for B0 -> eta' K0S the time dependent CP-violation parameters S and C. The data sample corresponds to 232 million B Bbar pairs produced by e+ e- annihilation at the Upsilon(4S). The results are BF(B+ -> eta' K+) = (68.9 +- 2.0 +- 3.2) * 10^-6, BF(B0 -> eta' K0) = (67.4 +- 3.3 +- 3.2) * 10^-6, Ach = 0.033 +- 0.028 +- 0.005, S=0.30 +- 0.14 +- 0.02, C=-0.21 +- 0.10 +- 0.02, where the first error is statistical and the second systematic.