FERMILAB-PUB-12-257-T Cornering New Physics in b → s Transitions

We derive constraints on Wilson coefficients of dimension-six effective operators probing the b → s transition, using recent improved measurements of the rare decays Bs → µ+µ−, B → Kµ+µ − and B → K∗µ+µ − and including all relevant observables in inclusive and exclusive decays. We consider operators present in the SM as well as their chirality-flipped counterparts and scalar operators. We find good agreement with the SM expectations. Compared to the situation before winter 2012, we find significantly more stringent constraints on the chirality-flipped coeffi-cients due to complementary constraints from B → Kµ+µ − and B → K∗µ+µ − and due to the LHCb measurement of the angular observable S3 in the latter decay. We also list the full set of observables sensitive to new physics in the low recoil region of B → K∗µ+µ−. 1