Phenomenology of Light Fermionic Asymmetric Dark Matter

TL;DR

This paper explores the phenomenology of a minimal GeV-scale fermionic asymmetric dark matter model with a light scalar, analyzing current constraints and future detection prospects across cosmology, collider, and direct detection experiments.

Contribution

It provides a comprehensive analysis of the constraints and future detection prospects for a minimal fermionic ADM model with a light scalar particle.

Findings

Current constraints from cosmology, dark matter detection, and collider searches are detailed.

Future experiments like next-generation direct detection, Higgs measurements, and LHC searches can probe significant parameter space.

The model's viability depends on upcoming experimental sensitivities to light scalars and Higgs properties.

Abstract

Asymmetric dark matter (ADM) has been an attractive possibility attempting to explain the observed ratio of baryon to dark matter abundance in the universe. While a bosonic ADM is constrained by the limits from existence of old neutron stars, a fermionic ADM requires an additional light particle in order to annihilate its symmetric component in the early universe. We revisit the phenomenology of a minimal GeV scale fermionic ADM model including a light scalar state. The current constraints on this scenario from cosmology, dark matter direct detection, flavour physics and collider searches are investigated in detail. We estimate the future reach on the model parameter space from next-generation dark matter direct detection experiments, Higgs boson property measurements and search for light scalars at the LHC, as well as the determination of Higgs invisible branching ratio at the proposed ILC.