Theory of Dirac Dark Matter: Higgs Decays and EDMs

TL;DR

This paper presents a theory linking Dirac dark matter, Higgs decays, and electric dipole moments, with predictions testable by current and future experiments across multiple domains.

Contribution

It introduces a simple gauge anomaly cancellation model predicting Dirac dark matter and explores its implications for Higgs decays and EDMs.

Findings

Dark matter relic abundance constrains the theory to a few tens of TeV.

Large branching ratio of the new Higgs decay into two photons.

Strong correlation between dark matter constraints and Higgs decay properties.

Abstract

We discuss a simple theory predicting the existence of a Dirac dark matter candidate from gauge anomaly cancellation. In this theory, the spontaneous breaking of local baryon number at the low scale can be understood. We show that the constraint from the dark matter relic abundance implies an upper bound on the theory of a few tens of TeV. We study the correlation between the dark matter constraints and the prediction for the electric dipole moment (EDM) of the electron. We point out the implications for the diphoton decay width of the Standard Model Higgs. Furthermore, we study the decays of the new Higgs present in the theory, we show that the branching ratio into two photons can be large and discuss the strong correlation between the dark matter constraints and the properties of the new Higgs decays. This theory could be tested at current or future experiments by combining the results from dark matter, collider and EDM experiments.