Simple SUSY Breaking Mechanism by Coexisting Walls

TL;DR

This paper proposes a novel SUSY breaking mechanism involving coexisting domain walls, where the breaking scale diminishes exponentially with wall separation, avoiding messenger fields and providing explicit models and phenomenological insights.

Contribution

It introduces a new SUSY breaking method using stable two-wall configurations in four dimensions, with explicit solutions and analysis of soft SUSY breaking terms.

Findings

Effective SUSY breaking scale decreases exponentially with wall separation.

Explicit stable non-BPS two-wall solutions in four-dimensional models.

Soft SUSY breaking terms can be derived within this framework.

Abstract

A SUSY breaking mechanism with no messenger fields is proposed. We assume that our world is on a domain wall and SUSY is broken only by the coexistence of another wall with some distance from our wall. We find an ${\cal N}=1$ model in four dimensions which admits an exact solution of a stable non-BPS configuration of two walls and studied its properties explicitly. We work out how various soft SUSY breaking terms can arise in our framework. Phenomenological implications are briefly discussed. We also find that effective SUSY breaking scale becomes exponentially small as the distance between two walls grows.