14.11.13 10:00
Recent results about the decay B → K*μ+μ-
Sébastien Descotes-Genon (Orsay)
The decay B → K*μ+μ- is a very interesting process. This flavour-changing neutral current has a particularly rich phenomenology with many observables accessible (in particular) at the LHCb experiment. In addition, this process can be analyzed in the model-independent framework of the effective Hamiltonian, allowing for an elegant separation of short-distance processes and hadronic contributions. Recent LHCb results suggest that some observables deviate from the expectations of the Standard Model in the region of large K*-meson recoil. After recalling the advantages of these observables and the elements necessary for their analysis (angular analysis, form factors, factorisation approaches), I will discuss the observed deviations in terms of New Physics contributions. Combining these results with b → s γ radiative decays suggests a consistent pattern with a New Physics contribution to the so-called effective operator O9. I will discuss briefly implications of such a contribution, as well as possible issues with the SM computation of these observables.
(please note unusual time and place: Besprechungsraum 2. Stock)