Gauge Mediation with Sequestered Supersymmetry Breaking

TL;DR

This paper proposes a conformal sequestering approach in gauge mediation models to solve the nd B_nd nd dark matter abundance problems, achieving correct mass scales and coannihilation conditions.

Contribution

It introduces a novel conformal sequestering mechanism that addresses key issues in gauge mediation, including the nd B_nd problem and dark matter relic density prediction.

Findings

Correct nd B_nd mass scale generated with gravitino mass 00 GeV

Large anomalous dimension facilitates coannihilation for dark matter

Model avoids flavor-changing neutral-current problems

Abstract

Gauge mediation models have two drawbacks, that is, the so-called \mu-problem and a lack of predictability of the gravitino dark matter abundance. We show that conformal sequestering in the supersymmetry breaking sector offers attractive solutions to both problems. The correct mass scale of the \mu and B_\mu terms is generated by taking the gravitino mass of O(100) GeV without causing the flavor-changing neutral-current problem. Moreover, a large anomalous dimension of the supersymmetry breaking field naturally realizes the small stau and neutralino mass difference required for the coannihilation to work yielding the right dark matter abundance.