Investigation of inclusive CP asymmetries in B0 decays

R. Barate, D. Decamp, P. Ghez, C. Goy, J. P. Lees, E. Merle, M. N. Minard, B. Pietrzyk, S. Bravo, M. P. Casado, M. Chmeissani, J. M. Crespo, E. Fernandez, M. Fernandez-Bosman, L. Garrido, E. Graugés, M. Martínez, G. Merino, R. Miquel, L. M. MirA. Pacheco, H. Ruiz, A. Colaleo, D. Creanza, M. de Palma, 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, G. Boix, O. Buchmüller, M. Cattaneo, F. Cerutti, G. Dissertori, H. Drevermann, R. W. Forty, M. Frank, T. C. Greening, J. B. Hansen, J. Harvey, P. Janot, B. Jost, I. Lehraus, P. Mato, A. Minten, A. Moutoussi, F. Ranjard, L. Rolandi, D. Schlatter, M. Schmitt, O. Schneider, P. Spagnolo, W. Tejessy, F. Teubert, E. Tournefier, A. E. Wright, Z. Ajaltouni, F. Badaud, G. Chazelle, O. Deschamps, A. Falvard, P. Gay, C. Guicheney, P. Henrard, J. Jousset, B. Michel, S. Monteil, J. C. Montret, D. Pallin, P. Perret, F. Podlyski, J. D. Hansen, J. R. Hansen, P. H. Hansen, B. S. Nilsson, B. A. Petersen, A. Wäänänen, G. Daskalakis, A. Kyriakis, C. Markou, E. Simopoulou

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20 Citations (Scopus)

Abstract

A search for CP violating effects in the mixing of neutral B mesons is performed using a sample of 4.1 million hadronic Z decays collected with the ALEPH detector from 1991 to 1995. By studying time-dependent asymmetries in flavour-tagged samples of semileptonic and fully inclusive b-hadron decays, two measurements of the semileptonic asymmetry aCP are extracted. No evidence for CP violation is observed, and the combined value aCP = -0.013 ± 0.026 is obtained.
Original languageEnglish
Pages (from-to)431-443
JournalEuropean Physical Journal C
Volume20
Issue number3
Publication statusPublished - 1 Jan 2001

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