The FIMP-WIMP dark matter in the extended singlet scalar model

TL;DR

This paper investigates a minimal dark matter model involving a singlet scalar and fermions, analyzing relic density, experimental constraints, and collider prospects at the 14 TeV LHC with MATHUSLA detectors.

Contribution

It introduces a simple dark matter model with scalar and fermions, studying relic density, experimental constraints, and collider signatures with detailed analysis.

Findings

Relic density can be achieved via Freeze-in and Freeze-out mechanisms.

Muon anomalous magnetic moment constraints are considered.

Heavy charged fermions can produce detectable collider signals at the LHC.

Abstract

We explore the simplest viable dark matter model with a real singlet scalar, vector-like singlet and doublet fermions. The Yukawa couplings associated with the fermion sector play a crucial role in getting the current relic density through Freeze-in and Freeze-out mechanism. We discuss the constraints from the recent muon anomalous magnetic moment experimental data and relic density. We also perform the collider analysis for the FIMP dark matter in the context of 14 TeV LHC experiments with the MATHUSLA100/200 detector. Our analysis shows that one can get enough events $>3$ for heavy charged fermion track at 14 TeV LHC with an integrated luminosity $\mathcal{L}=10^6 ~{\rm fb^{-1}}$.