B -> Xs l+ l- decays in supersymmetry

TL;DR

This paper investigates how supersymmetric models can significantly alter the decay rates and asymmetries of B -> Xs l+ l- processes, highlighting potential deviations from Standard Model predictions.

Contribution

It provides a detailed analysis of SUSY effects on B -> Xs l+ l- decays using the mass insertion approximation, including constraints from other processes and non-perturbative corrections.

Findings

Branching ratios can be strongly modified by SUSY effects.

Forward-Backward asymmetry behavior changes notably from the Standard Model.

SUSY contributions can lead to observable deviations in decay observables.

Abstract

We study the semileptonic decays B -> Xs e+ e- and B -> Xs mu+ mu- in generic supersymmetric extensions of the Standard Model. SUSY effects are parameterized using the mass insertion approximation formalism and differences with the Constrained MSSM results are pointed out. Constraints on SUSY contributions coming from other processes (e.g. b -> s photon) are taken into account. Chargino and gluino contributions to photon and Z-mediated decays are computed and non-perturbative corrections are considered. We find that the integrated branching ratios and the asymmetries can be strongly modified. Moreover, the behavior of the differential Forward-Backward asymmetry remarkably changes with respect to the Standard Model expectation.