Huge right-handed current effects in B → K*(Kπ) ℓ+ℓ- in supersymmetry

Abstract

Transverse asymmetries in the decay B → K*(Kπ) ℓ+ℓ- are an extremely sensitive probe of right-handed flavour-changing neutral currents. We show how to include the contribution from the chiral partner of the electromagnetic operator on the transverse asymmetries at NLO in QCD factorization. We then consider supersymmetric models with non-minimal flavour violation in the down-squark sector. We include all the relevant experimental constraints and present a numerical formula for B → Xsγ that takes into account the most recent NNLO calculations. We show that the flavour-changing parameters of these models are poorly constrained by present data and allow for large effects on the transverse asymmetries that we consider. © SISSA 2007.