Singlet Dirac Fermion Dark Matter with Mediators at Loop

TL;DR

This paper explores a model where singlet Dirac fermion dark matter interacts with Standard Model particles via loop processes involving mediators, highlighting the role of CP phases in inducing detectable electric dipole moments.

Contribution

It introduces a detailed phenomenological analysis of singlet Dirac fermion dark matter with loop-level interactions and CP phases, emphasizing testable predictions for future experiments.

Findings

Electric dipole moments can be induced in dark matter and Standard Model particles.

Direct detection experiments can probe the dark matter scenario.

Electric dipole moment measurements can test the model's validity.

Abstract

We study the phenomenology of singlet Dirac fermion dark matter in the simplified models where the dark matter interacts with the Standard Model particles at loop-level with the help of either colored or non-colored mediators. We especially focus on the implications of non-zero CP phases in the dark sector, which induce the electric dipole moments of the Dirac fermion dark matter as well as those of electron and nucleon. It is then found that the dark matter direct detection searches and the measurements of the electric dipole moments are able to test the singlet Dirac fermion dark matter scenario in the forthcoming experiments.