Tree Level Gauge Mediation

TL;DR

This paper introduces a novel tree-level gauge mediation mechanism for supersymmetry breaking, ensuring flavor-universal sfermion masses and distinctive predictions for sfermion mass ratios, testable at the LHC.

Contribution

It presents a new scheme where supersymmetry breaking is communicated via GUT gauge interactions at tree level, addressing flavor issues and providing testable mass ratio predictions.

Findings

Sfermion masses are flavor universal, solving the supersymmetric flavor problem.

Predicted sfermion mass ratios differ from mSugra, enabling experimental tests.

Gaugino masses are loop-generated and can be enhanced by model-dependent factors.

Abstract

We propose a new scheme in which supersymmetry breaking is communicated to the MSSM sfermions by GUT gauge interactions at the tree level. The (positive) contribution of MSSM fields to $\text{Str}(\mathcal{M}^2)$ is automatically compensated by a (negative) contribution from heavy fields. Sfermion masses are flavour universal, thus solving the supersymmetric flavour problem. In the simplest SO(10) embedding, the ratio of different sfermion masses is predicted and differs from mSugra and other schemes, thus making this framework testable at the LHC. Gaugino masses are generated at the loop level but enhanced by model dependent factors.