A New Approach to a Global Fit of the Ckm Matrix
نویسندگان
چکیده
We report on a new approach to a global CKM matrix analysis taking into account most recent experimental and theoretical results. The statistical framework (Rfit) developed in this paper advocates frequentist statistics. Other approaches, such as Bayesian statistics or the 95% CL scan method are also discussed. We emphasize the distinction of a model testing and a model dependent, metrological phase in which the various parameters of the theory are estimated. Measurements and theoretical parameters entering the global fit are thoroughly discussed, in particular with respect to their theoretical uncertainties. Graphical results for confidence levels are drawn in various one and two-dimensional parameter spaces. Numerical results are provided for all relevant CKM parameterizations, the CKM elements and theoretical input parameters. Predictions for branching ratios of rareK and B meson decays are obtained. A simple, predictive SUSY extension of the Standard Model is discussed. (Accepted for publication in The European Physical Journal C)
منابع مشابه
Global fit to CKM data
We present updated results for the CKM matrix elements from a global fit to flavour physics data within the standard model theoretical context. We emphasise recent improvements on the determination of the CKM parameters λ and A as well as on the angle γ of the unitarity triangle.
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تاریخ انتشار 2001