Dark Matter in Anomalous $U(1)'$ Models with neutral mixing

TL;DR

This paper investigates the properties of the lightest fermionic particles in an anomalous $U(1)'$ supersymmetric model, demonstrating that the LSP as an XWIMP can account for observed dark matter relic density.

Contribution

It introduces a novel analysis of the fermionic sector in an anomalous $U(1)'$ model, showing the viability of XWIMP as dark matter consistent with WMAP data.

Findings

The LSP is an XWIMP with suitable relic density.

Numerical adaptation of DarkSUSY confirms dark matter compatibility.

Model provides a new framework for dark matter in supersymmetry.

Abstract

We study the lightest masses in the fermionic sector of an anomalous $U(1)'$ extension of the minimal supersymmetric standard model inspired by brane constructions. The LSP of this model is an XWIMP (extremely weak interaction particle) which is shown to have a relic density satisfying WMAP data. This computation is carried out numerically after having adapted the DarkSUSY package to our case.