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 a(CP) = -0.013 +/- 0.026 is obtained.
Investigation of inclusive CP asymmetries in B-0 decays
MESSINEO, ALBERTO MARIA;RIZZO, GIULIANA;
2001-01-01
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 a(CP) = -0.013 +/- 0.026 is obtained.File in questo prodotto:
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