ar X iv : h ep - p h / 02 10 29 1 v 1 2 2 O ct 2 00 2 THE UNITARITY TRIANGLE : 2002 AND BEYOND
نویسنده
چکیده
We describe the present status of the Unitarity Triangle and we give an outlook for its future determinations. We discuss new sets of fundamental flavour parameters and comment briefly on new physics beyond the Standard Model. Many parametrizations of the CKM matrix have been proposed in the literature. The classification of different parametrizations can be found in 3. While the so called standard parametrization 4 should be recommended 5 for any numerical analysis, a generalization of the Wolfenstein parametrization 6 as presented in 7 is more suitable for my talk. On the one hand it is more transparent than the standard parametrization and on the other hand it satisfies the unitarity of the CKM matrix to higher accuracy than the original parametrization in 6. Following then the procedure in 7 we find V ud = 1 − 1 2 λ 2 − 1 8 λ 4 , V cs = 1 − 1 2 λ 2 − 1 8 λ 4 (1 + 4A 2) (2)
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