Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-10-11
Physics
High Energy Physics
High Energy Physics - Phenomenology
4 pages; 4 figures (requires epsfig, psfrag); To appear in the proceedings of 32nd International Conference on High-Energy Phy
Scientific paper
We analyze the impact of the forthcoming CP-violating observables in the $B_s\to K^+ K^-$ system, combined with the precise measurement of $\sin2\beta$ , in the extraction of the CKM matrix. Computing the penguin parameters $(r, \theta)$ within QCD factorization yields a precise determination of $(\bar\rho, \bar\eta)$, reflected by a weak dependence on $\theta$, 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 $B_d \to \pi^+ \pi^-$ modes, we complement the $B_s \to K^+ K^-$ 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.
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