Supersymmetry breaking, R-symmetry, and conformal dynamics

TL;DR

This paper explores how conformal dynamics influence R-symmetry and supersymmetry breaking in N=1 theories, proposing mechanisms for metastable vacua and gauge symmetry breaking relevant to standard model-like physics.

Contribution

It introduces a scenario where conformal dynamics induce approximate R-symmetry and metastable SUSY breaking vacua, and analyzes RG flows in duality cascades with applications to standard-model-like models.

Findings

Conformal dynamics can generate approximate R-symmetry and metastable SUSY breaking.

RG flow analysis of SUSY breaking terms in duality cascades.

Models suggest pathways to standard-model-like physics and electroweak symmetry breaking.

Abstract

We study N=1 global and local supersymmetric theories with a continuous global U(1)_R symmetry. We discuss conditions for supersymmetry (SUSY) breaking and vacuum structures of R-symmetric SUSY models. Especially we find the conditions for R-symmetry breaking and runway vacua in global supersymmetric theories. We introduce explicit R-symmetry breaking terms into such models in global and local supersymmetric theories. We classify explicit R-symmetry breaking terms by the structure of newly appeared SUSY stationary points as a consequence of the R-breaking effect. Based on the generic argument, we propose the scenario that conformal dynamics causes approximate R-symmetry and metastable SUSY breaking vacua at a low energy scale. Furthermore, we find that conformal dynamics also leads approximate R-symmetry in softly SUSY breaking theories, even in more complicated models such as the duality cascade. We investigate the RG flow of SUSY breaking terms as well as supersymmetric couplings in the duality cascade of softly broken supersymmetric theories. We also show the possibility that cascading would be terminated by the gauge symmetry breaking, which is induced by the so-called B-term. Finally, we find some models to arrive at standard-model-like models and to cause gauge symmetry breaking corresponding to electro-weak symmetry breaking.