CP Violation in B Mixing and Decays

E-ISSN： 2100-014x|49|issue|13005-13005

ISSN： 2100-014x

Source： EPJ Web of Conference, Vol.49, Iss.issue, 2013-05, pp. : 13005-13005

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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.