$B_{s,d}^0\to \mu \bar{\mu }$ and $B\to X_s\gamma$ in the R-parity violating MSSM

Abstract

The recent measurements of $B_s^0\to \mu \bar{\mu }$ decay candidates at the LHC consistent with the standard model rate, and the improving upper limits for $B_d^0\to \mu \bar{\mu }$ can strongly constrain beyond the standard model physics. For example, in supersymmetric models with broken R-parity (RpV), they restrict the size of the new couplings. We use the combination of the public software packages SARAH and SPheno to derive new bounds on several combinations of R-parity violating couplings. We improve existing limits for the couplings which open tree-level decay channels and state new limits for combinations which induce loop contributions. This is the first study which performs a full one-loop analysis of these observables in the context of R-parity violation. It turns out that at one-loop despite the strong experimental limits only combinations of R-parity violating couplings are constrained which include third generation fermions. We compare our limits with those obtained via $B\to X_s\gamma$ and discuss the differences.

26 pages, 10 figures

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• Scalar leptoquarks and the rare B meson decays
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