Dilaton-assisted Dark Matter

TL;DR

This paper explores how a dilaton could mediate interactions between dark matter and Standard Model particles, predicting relic abundance, scattering cross sections, and potential gamma-ray signals, with constraints from collider and astrophysical data.

Contribution

It introduces a dilaton-based framework linking dark matter properties to conformal symmetry breaking, providing new predictions for detection and constraints.

Findings

Relic abundance relates dark matter mass and spin to conformal breaking scale.

Predicted dark matter-nucleon cross section depends on dilaton mass.

Gamma-ray signals from dark matter annihilation to dilatons could be observable by Fermi-LAT.

Abstract

A dilaton could be the dominant messenger between Standard Model fields and dark matter. The measured dark matter relic abundance relates the dark matter mass and spin to the conformal breaking scale. The dark matter-nucleon spin-independent cross section is predicted in terms of the dilaton mass. We compute the current constraints on the dilaton from LEP and Tevatron experiments, and the gamma-ray signal from dark matter annihilation to dilatons that could be observed by Fermi-LAT.