CP Violation in B Mixing and Decays

Recent LHCb results on CP violation in B mixing and decays are reported. The analyses are based on 1 fb 1 of pp collisions at p s = 7 TeV recorded in 2011. First evidence is presented for CP violation in B decays to the K K + K , K + K , and + final states. The CP violating flavour specific asymmetry, a s sl , is measured to be ( 0:24 0:54stat 0:33syst) 10 2 , in good agreement with Standard Model expectations. A flavour tagged and time dependent analysis of the decays, Bs ! J= and Bs ! J= + , measures s = 0:002 0:083stat 0:027syst rad, in good agreement with Standard Model predictions.