R-parity violating supersymmetry, B_s mixing, and D_s -> l nu

Abstract

Recently, it was pointed out that the mixing phase in the Bs-Bsbar system is large, contrary to the expectations in the Standard Model as well as in minimal flavour violation models. The leptonic decay widths of the D_s meson are also found to be larger than expected. We show how a minimal set of four R-parity violating lambda-prime type couplings can explain both these anomalies. We also point out other phenomenological implications of such new physics.

Comments: 4 pages, minor corrections in the nature of clarification, a few references added, version to be published in PRD