Maximal Sfermion Flavor Violation in Super-GUTs

TL;DR

This paper explores how, in certain super-GUT models with specific scalar and gaugino mass hierarchies, maximal flavor violation can occur without leading to supersymmetric flavor problems, challenging conventional assumptions.

Contribution

It introduces the MaxSFV scenario where scalar masses can maximally violate flavor without causing issues, within super-GUT frameworks with particular mass hierarchies.

Findings

MaxSFV allows large scalar flavor violation without supersymmetric flavor problems.

Gauge coupling effects dominate renormalization, leading to flavor violation independent of scalar masses.

The scenario is demonstrated in various super-GUT models based on no-scale gravity.

Abstract

We consider supersymmetric grand unified theories with soft supersymmetry-breaking scalar masses $m_0$ specified above the GUT scale (super-GUTs) and patterns of Yukawa couplings motivated by upper limits on flavour-changing interactions beyond the Standard Model. If the scalar masses are smaller than the gaugino masses $m_{1/2}$, as is expected in no-scale models, the dominant effects of renormalization between the input scale and the GUT scale are generally expected to be those due to the gauge couplings, which are proportional to $m_{1/2}$ and generation-independent. In this case, the input scalar masses $m_0$ may violate flavour maximally, a scenario we call MaxSFV, and there is no supersymmetric flavour problem. We illustrate this possibility within various specific super-GUT scenarios that are deformations of no-scale gravity.