Abstract
Precision measurements of branching fractions and CP asymmetries in non-leptonic b → s decays reveal certain ``puzzles'' when compared with Standard Model expectations based on a global fit of the CKM triangle and general theoretical expectations. Without reference to a particular model, we investigate to what extent the (small) discrepancies observed in B → J/ψK, B → ϕK and B → Kπ may constrain new physics in b → sq operators. In particular, we compare on a quantitative level the relative impact of different quark flavours q = c, s, u, d.
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