Extracting the mixing angle from B→VV decays and comments on the puzzling B→K∗l+l− decay

Three different strategies to extract the weak mixing phase ϕs of the Bs system using B→VV decays (, and Bs→ϕϕ) are discussed. Those penguin-mediated decays are computed in the framework of a new combined QCD-Factorisation/Flavour Symmetry Method. Also some comments on the recent interesting results found by Babar concerning the decay B→K∗l+l− are included.