B -> K* mu+ mu- optimised observables in the MSSM

TL;DR

This paper analyzes how recent measurements of B -> K* mu+ mu- decay observables constrain the MSSM, showing that the data strongly limits SUSY models, comparable to other key flavor physics constraints.

Contribution

It provides a comprehensive analysis of the impact of new B -> K* mu+ mu- observables on MSSM parameter space, including both constrained and general scenarios.

Findings

MSSM solutions remain compatible with data.

B -> K* mu+ mu- constraints are now as strong as b -> s gamma.

Implications for Wilson coefficients and SUSY parameters are discussed.

Abstract

We provide a detailed analysis of the impact of the newly measured optimised observables in the B -> K* mu+ mu- decay by the LHCb experiment. The analysis is performed in the MSSM, both in the context of the usual constrained scenarios, and in the context of a more general set-up where the SUSY partner masses are independent. We show that the global agreement of the MSSM solutions with the data is still very good. Nevertheless, especially in the constrained scenarios, the limits from B -> K* mu+ mu- are now very strong, and are at the same level as the well-known b -> s gamma constraints. We describe the implications of the B -> K* mu+ mu- measurements both on the Wilson coefficients and on the SUSY parameters.