Flavour Violating Interactions of Supersymmetric Particles

TL;DR

This paper develops renormalization group equations for supersymmetric couplings including flavour violation, and provides a computational tool to analyze flavour-changing decays in SUSY models.

Contribution

It introduces a new program incorporating flavour violating couplings into SUSY spectrum calculations with arbitrary high scale inputs.

Findings

Recalculated top squark decay branching ratio with flavour violation.

Provided a framework for high scale flavour structure in SUSY.

Enabled detailed study of SUSY flavour changing processes.

Abstract

We derive the renormalization group equations for dimensionless couplings and soft supersymmetry breaking (SSB) parameters given arbitrary high scale inputs, incorporating 1-loop thresholds. A program (to be incorporated into ISAJET) has been developed, which includes flavour violating couplings of superparticles based on an arbitrary framework for the high scale flavour structure of SSB parameters. The weak scale flavour structure derived in this way can be applied to the study of SUSY flavour changing decays. As an illustration, we recalculate the branching ratio of the flavour-violating decay of the top squark.