Direct detection of singlet dark matter in classically scale-invariant standard model

TL;DR

This paper investigates the direct detection prospects of singlet scalar dark matter in a classically scale-invariant standard model extension, showing some parameter space is already excluded and the rest is testable in future experiments.

Contribution

It provides the first detailed analysis of direct detection signals for singlet scalar dark matter within a classically scale-invariant framework.

Findings

Some parameter regions are already excluded by current experiments.

Remaining viable parameter space can be tested by future direct detection experiments.

The model predicts observable deviations in Higgs properties at colliders.

Abstract

Classical scale invariance is one of the possible solutions to explain the origin of the electroweak scale. The simplest extension is the classically scale-invariant standard model augmented by a multiplet of gauge singlet real scalar. In the previous study it was shown that the properties of the Higgs potential deviate substantially, which can be observed in the International Linear Collider. On the other hand, since the multiplet does not acquire vacuum expectation value, the singlet components are stable and can be dark matter. In this letter we study the detectability of the real singlet scalar bosons in the experiment of the direct detection of dark matter. It is shown that a part of this model has already been excluded and the rest of the parameter space is within the reach of the future experiment.