Investigation of inclusive CP asymmetries in B-0 decays

Barate, R Decamp, D Ghez, P Goy, C Lees, JP Merle, E Minard, MN Pietrzyk, B Bravo, S Casado, MP Chmeissani, M Crespo, JM Fernandez, E Fernandez-Bosman, M Garrido, L Grauges, E Martinez, M Merino, G Miquel, R Mir, LN Pacheco, A Ruiz, H Colaleo, A Creanza, D de Palma, M Iaselli, G Maggi, G Maggi, A Nuzzo, S Ranieri, A Raso, G Ruggieri, F Selvaggi, G Silvestris, L Tempesta, P Tricomi, A Zito, G Huang, X Lin, J Ouyang, Q Wang, T Xie, Y Xu, R Xue, S Zhang, J Zhang, L Zhao, W Abbaneo, D Boix, G Buchmuller, O Cattaneo, M Cerutti, F Dissertori, G Drevermann, H Forty, RN Frank, M Greening, TC Hansen, JB Harvey, J Janot, P Jost, B Lehraus, L Mato, P Minten, A Moutoussi, A Ranjard, F Rolandi, L Schlatter, D Schmitt, N Schneider, O Spagnolo, P Tejessy, W Teubert, F Tournefier, E Wright, AE Ajaltouni, Z Badaud, F Chazelle, G Deschamps, O Falvard, A Gay, P Guicheney, C Henrard, P Jousset, J Michel, B Monteil, S Montret, JC Pallin, D Perret, P Podlyski, F Hansen, JD Hansen, JR Hansen, PH Nilsson, BS Petersen, BA Waananen, A Daskalakis, G Kyriakis, A Markou, C Simopoulou, E Vayaki, A Blondel, A Bonnaud, G Brient, JC Rouge, A Rumpf, M Swynghedauw, M Verderi, M Videau, H Focardi, E Parrini, G Zachariadou, K Antonelli, A Antonelli, N Bencivenni, G Bologna, G Bossi, F Campana, P Capon, G Chiarella, V Laurelli, P Mannocchi, G Murtas, F Murtas, GP Passalacqua, L Pepe-Altarelli, M Halley, AW Lynch, JG Negus, P O'Shea, V Raine, C Teixeira-Dias, P Thompson, AS Cavanaugh, R Dhamotharan, S Geweniger, C Hanke, P Hansper, G Hepp, V Kluge, EE Putzer, A Sommer, J Tittel, K Werner, S Wunsch, M Beuselinck, R Binnie, DM Cameron, W Dornan, PJ Girone, M Marinelli, N Sedgbeer, JK Thompson, JC Thompson, E Ghete, VM Girtler, P Kneringer, E Kuhn, D Rudolph, G Bowdery, CK Buck, PC Finch, AJ Foster, F Hughes, C Jones, RWL Robertson, NA Giehl, I Jakobs, K Kleinknecht, K Quast, G Renk, B Rohne, E Sander, HG Wachsmuth, H Zeitnitz, C Bonissent, A Carr, J Coyle, P Leroy, O Payre, P Rousseau, D Talby, M Aleppo, M Ragusa, F Dietl, H Ganis, G Heister, A Huttmann, K Lutjens, G Mannert, C Manner, W Moser, HG Schael, S Settles, R Stenzel, H Wiedenmann, W Wolf, G Azzurri, P Boucrot, J Callot, O Chen, S Cordier, A Davier, X Duflot, L Grivaz, JF Heusse, P Jacholkowska, A Le Diberder, F Lefrancois, J Lutz, AM Schune, MH Veillet, JJ Videau, I Yuan, C Zerwas, D Bagliesi, G Boccali, T Calderini, G Ciulli, V Foa, L Giassi, A Ligabue, F Messineo, A Palla, F Rizzo, G Sanguinetti, G Sciaba, A Sguazzoni, G Tenchini, R Venturi, A Verdini, PG Blair, GA Cowan, G Green, MG Medcalf, T Strong, JA von Wimmersperg-Toeller, JH Clifft, RW Edgecock, TR Norton, PR Tomalin, IR Bloch-Devaux, B Colas, P Emery, S Kozanecki, W Lancon, E Lemaire, MC Locci, E Perez, P Rander, J Renardy, JF Roussarie, A Schuller, JP Schwindling, J Trabelsi, A Vallage, B Black, SN Dann, JH Johnson, RP Kim, HY Konstantinidis, N Litke, AM McNeil, MA Taylor, C Booth, CN Cartwright, S Combley, F Lehto, M Thompson, LF Affholderbach, K Bohrer, A Brandt, S Grupen, C Misiejuk, A Prange, G Sieler, U Giannini, G Gobbo, B Rothberg, J Wasserbaech, S Armstrong, SR Cranmer, K Elmer, P Ferguson, DPS Gao, Y Gonzalez, S Hayes, OJ Hu, H Jin, S Kile, J McNamara, PA Nielsen, J Orejudos, W Pan, YB Saadi, Y Scott, IJ Walsh, J Wu, SL Wu, X Zobernig, C

R. Barate et al., Investigation of inclusive CP asymmetries in B-0 decays, EUR PHY J C, 20(3), 2001, pp. 431-443

32

INGLESE

Article

Physics

EUROPEAN PHYSICAL JOURNAL C

1434-6044 → ACNP

20

3

2001

431 - 443

ISI

1434-6044(200105)20:3<431:IOICAI>2.0.ZU;2-B

A search for CP violating effects in the mixing of neutral B mesons is perf ormed using a sample of 4.1 million hadronic Z decays collected with the AL EPH detector from 1991 to 1995. By studying time-dependent asymmetries in f lavour-tagged samples of semileptonic and fully inclusive b-hadron decays, two measurements of the semileptonic asymmetry acp are extracted. No eviden ce for CP violation is observed, and the combined value a(CP) = -0.013 +/- 0.026 is obtained.