Scalar Dark Matter in Scale Invariant Standard Model

TL;DR

This paper explores scalar dark matter models within a classically scale-invariant Standard Model, demonstrating their viability against observational constraints and analyzing the role of radiative corrections on the scalon mass.

Contribution

It introduces and analyzes single and two-component scalar dark matter models in a scale-invariant framework, addressing the hierarchy problem and observational constraints.

Findings

Models satisfy Planck/WMAP and direct detection constraints

Both single and two-component models are viable

Radiative corrections significantly affect scalon mass

Abstract

We investigate single and two-component scalar dark matter scenarios in classically scale invariant standard model which is free of the hierarchy problem in the Higgs sector. We show that despite the very restricted space of parameters imposed by the scale invariance symmetry, both single and two-component scalar dark matter models overcome the direct and indirect constraints provided by the Planck/WMAP observational data and the LUX/Xenon100 experiment. We comment also on the radiative mass corrections of the classically massless scalon that plays a crucial role in our study.