Velocity-dependent self-interacting dark matter and composite Higgs

TL;DR

This paper proposes a novel composite Higgs model where a Dirac fermion self-interacting dark matter candidate acquires mass through composite dynamics, addressing dark matter structure issues and the naturalness problem.

Contribution

It introduces a four-dimensional gauge theory model with composite particles that explains dark matter properties and satisfies multiple cosmological and experimental constraints.

Findings

Dark matter mass generated by composite dynamics.

Models naturally explain halo structure problems.

Models satisfy relic density and detection constraints.

Abstract

We show that the mass of a self-interacting dark matter candidate, specifically a Dirac fermion, can be generated by composite dynamics, with a light scalar mediator emerging alongside the Higgs itself as composite particles. These novel models naturally explain the halo structure problems at various scales and alleviates the Standard Model naturalness problem simultaneously. The relic density of the dark matter candidates is particle anti-particle symmetric and due to thermal freeze-out. These models are four-dimensional gauge theories with a minimal number of fermions charged under a new confining gauge group. Finally, we demonstrate that these models satisfy various constraints set by the dark matter relic density, Big Bang Nucleosynthesis, Cosmic Microwave Background, as well as direct and indirect detection experiments.