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Investigation of inclusive CP asymmetries in B0 decays

Research output: Contribution to journalJournal article


Journal publication date05/2001
JournalThe European Physical Journal C (EPJ C) - Particles and Fields
Number of pages13
Original languageEnglish


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.