Gluino-mediated FCNCs in the MSSM with large tan(beta)

TL;DR

This paper investigates how large tan(beta) in the MSSM enhances loop corrections, leading to significant gluino-mediated FCNCs that affect B meson decay CP asymmetries.

Contribution

It demonstrates the emergence of flavor-changing gluino couplings in the MSSM with large tan(beta) and their impact on the Wilson coefficient C_8.

Findings

Gluino-mediated FCNCs are significantly enhanced at large tan(beta).

These corrections influence the CP asymmetry in B_d -> phi K_S decays.

The study highlights the importance of gluino-squark contributions in flavor physics.

Abstract

We present results of our study of tan(beta)-enhanced loop corrections in the Minimal Supersymmetric Standard Model (MSSM) with Minimal Flavour Violation (MFV). We demonstrate that these corrections induce flavour changing neutral current (FCNC) gluino couplings which have a large impact on the Wilson coefficient C_8 of the chromomagnetic operator. To illustrate the phenomenological consequences of this gluino-squark contribution to C_8, we briefly discuss its effect on the mixing-induced CP asymmetry in the decay B_d -> phi K_S.