EPJ Web of Conferences 49, 13005 (2013)
https://doi.org/10.1051/epjconf/20134913005

CP Violation in B Mixing and Decays

CERN

^a e-mail: mika.vesterinen@cern.ch

Abstract

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 √s = 7 TeV recorded in 2011. First evidence is presented for CP violation in B^± decays to the K^±K⁺K⁻, π^±K⁺K⁻, and π^±π⁺π⁻ final states. The CP violating flavour specific asymmetry, a_sl^s, is measured to be (−0.24 ± 0.54_stat ± 0.33_syst) × 10⁻², in good agreement with Standard Model expectations. A flavour tagged and time dependent analysis of the decays, B_s → J/ψϕ and B_s → J/ψπ⁺π⁻, measures ϕ_s = −0.002 ± 0.083_stat ± 0.027_syst rad, in good agreement with Standard Model predictions.