S. Descotes-Genon, D. Gosh, J. Matias, M. Ramon
We discuss the model dependence in the determination of the Wilson
coefficient C_7 that governs the radiative electromagnetic decays of B mesons
in the Standard Model, by considering various extensions of the effective
Hamiltonian used to describe such decays. We include already measured
observables like the branching ratios of B->X_s mu+ mu- and B->X_s gamma, the
isospin and CP asymmetries in B->K* gamma, as well as A_FB and F_L in B->K* l+
l$, adding the LHCb measurements presented at this conference. We explore the
constraints on C_7,C_9,C_10 as well as their chirality-flipped counterparts. We
also discuss the transverse asymmetry A_T^2$ which, once measured, may help to
disentangle some of the scenarios considered.
View original:
http://arxiv.org/abs/1202.2172
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