Asymmetric Dark Matter and Effective Operators

TL;DR

This paper investigates effective operators enabling asymmetric dark matter to annihilate into quarks, analyzing constraints from cosmology, direct detection, and collider searches to delineate viable models.

Contribution

It systematically constrains the parameter space of effective operators for asymmetric dark matter annihilation using multiple experimental bounds.

Findings

Allowed parameter space is highly constrained.

Collider and direct detection limits significantly restrict models.

Viable models require non-trivial conditions.

Abstract

In order to annihilate in the early Universe to levels well below the measured dark matter density, asymmetric dark matter must possess large couplings to the Standard Model. In this paper, we consider effective operators which allow asymmetric dark matter to annihilate into quarks. In addition to a bound from requiring sufficient annihilation, the energy scale of such operators can be constrained by limits from direct detection and monojet searches at colliders. We show that the allowed parameter space for these operators is highly constrained, leading to non-trivial requirements that any model of asymmetric dark matter must satisfy.