Relic Densities of Gauged Axions and Supersymmetry

TL;DR

This paper explores a supersymmetric model with an anomalous gauge symmetry that includes a gauged axion, analyzing its relic density and constraints from dark matter experiments to understand its phenomenological implications.

Contribution

It introduces the USSM-A model with a gauged axion and performs comprehensive relic density simulations within this framework.

Findings

Bounds from CAST and WMAP constrain the axion-gauge interaction scale.

Relic density calculations show compatibility with dark matter observations.

The model generalizes the Peccei-Quinn mechanism in a supersymmetric context.

Abstract

We illustrate the structure and the main phenomenological features of a supersymmetric model (the USSM-A) built following a bottom-up approach and containing an anomalous abelian gauge symmetry. This model supports a gauged axion in its spectrum and provides a generalization of the global (supersymmetric) Peccei-Quinn construction. Complete simulations of the neutralino relic density are performed. Bounds from CAST and WMAP, combined with dark matter simulations, provide significant constraints on the scale of the interactions between the axion and the gauge fields.