Abstract
We review the current status of the Cabibbo-Kobayashi-Maskawa (CKM) matrix for quark mixing. The updated matrix is used to obtain a profile of the CKM unitarity triangle and estimates of the CP violating phases sin 2α, sin 2β and sin 2 γ that will be measured in neutral B meson decays. Measurements of the aforementioned CP asymetries, B s 0- B s 0 mixing and rare B decays will overconstrain the CKM unitarity triangle, thereby determining the mixing matrix precisely and possibly providing hints of physics beyond the standard model. The role of the B 0- B 0 mixing ratio x s x d (equivalently the mass difference ratio δM s δM d ) and the CKM-suppressed rare B decays in restricting the unitarity triangle is emphasized. The potential of rare B decays in searching for new physics involving flavour changing neutral current transitions, in particular B → X sℓ +ℓ − and B s → ℓ +ℓ −, is also briefly discussed.
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