Hierarchical Soft Terms and Flavor Physics

TL;DR

This paper investigates hierarchical soft terms in supersymmetry, highlighting their unique flavor violation patterns and potential to produce large $B_s$ mixing phases, with implications for current flavor physics experiments.

Contribution

It introduces the hierarchical soft terms framework and compares its flavor violation predictions to degenerate squark scenarios, emphasizing distinctive experimental signatures.

Findings

Hierarchical soft terms predict large $B_s$ mixing phases.

Flavor physics experiments are probing key parameter regions.

Distinctive flavor violation patterns differentiate from degenerate squark models.

Abstract

We study the framework of hierarchical soft terms, in which the first two generations of squarks and sleptons are heavier than the rest of the supersymmetric spectrum. This scheme gives distinctive predictions for the pattern of flavor violations, which we compare to the case of nearly degenerate squarks. Experiments in flavor physics have started to probe the most interesting parameter region, especially in $b\leftrightarrow s$ transitions, where hierarchical soft terms can predict a phase of $B_s$ mixing much larger than in the Standard Model.