Flavor-Safe Light Squarks in Higgs-Anomaly Mediation

TL;DR

This paper proposes a Higgs-anomaly mediation model with light squarks that avoids flavor problems, aligns with experimental constraints, and can explain the muon g-2 anomaly and Yukawa unification.

Contribution

It introduces a sequestered SUSY breaking setup with split sfermion masses, providing a flavor-safe and testable framework for supersymmetry.

Findings

Light squarks (~1 TeV) are accessible at future colliders.

The model naturally suppresses flavor-changing neutral currents.

It can simultaneously address muon g-2 and Yukawa unification constraints.

Abstract

We consider a simple setup with light squarks which is free from the gravitino and SUSY flavor problems. In our setup, a SUSY breaking sector is sequestered from the matter and gauge sectors, and it only couples to the Higgs sector directly with $\mathcal{O}(100)\,$TeV gravitino. Resulting mass spectra of sfermions are split: the first and second generation sfermions are light as $\mathcal{O}(1)\,$TeV while the third generation sfermions are heavy as $\mathcal{O}(10)\,$TeV. The light squarks of $\mathcal{O}(1)\,$TeV can be searched at the (high-luminosity) LHC and future collider experiments. Our scenario can naturally avoid too large flavor-changing neutral currents and it is consistent with the $\epsilon_K$ constraint. Moreover, there are regions explaining the muon $g-2$ anomaly and bottom-tau/top-bottom-tau Yukawa coupling unification simultaneously.