CKM MATRIX FROM NON-LEPTONIC B-DECAYS

摘要

We analyze the impact of the forthcoming CP- violating observables in the B_s → K~+ K~- system, combined with the precise measurement of sin 2β , in the extraction of the CKM matrix. Computing the penguin parameters (r, θ) within QCD factorization yields a precise determination of (ρ, η), reflected by a weak dependence on θ, which is shown to be a second order effect. Using the SU(3)-flavour symmetry argument and the current B-factories data provided by the B_d → π~+ π~- modes, we complement the B_s → K~+ K~- CP-violating observables in a variety of ways, in particular we find that S_(KK)> 0. Finally, we investigate systematically the SU(3)-symmetry breaking factor within QCD factorization.