CP Violation and Flavour Mixing in the Standard Model

الأصل · EN

We review and update the constraints on the parameters of the quark flavour mixing matrix VCKM in the standard model and estimate the resulting CP asymmetries in B decays, taking into account recent experimental and theoretical developments. In performing our fits, we use inputs from the measurements of the following quantities: (i), the CP-violating parameter in K decays, (ii), the mass difference due to the mixing, (iii) the matrix elements and, (iv) B-hadron lifetimes, and (v) the top quark mass. The experimental input in points (ii) - (v) has improved compared to our previous fits. With the updated CKM matrix we present the currently-allowed range of the ratios |Vtd/Vts| and |Vtd/Vub|, as well as the standard model predictions for the mixing parameter (or, equivalently,) and the quantities 2α, 2β and ²γ, which characterize the CP-asymmetries in B-decays. Various theoretical issues related to the so-called ``penguin-pollution," are of importance for the determination of the phases α and γ from the CP-asymmetries in B decays, are also discussed. (to be published in the proc. of the Pisa heavy flavour physics conference.)