Singlet particles as cold dark matter in noncommutative space-time

TL;DR

This paper explores how singlet particles in a noncommutative space-time framework can serve as cold dark matter, analyzing their relic density and establishing relations between the noncommutative scale and dark matter properties.

Contribution

It extends the noncommutative standard model to include singlet particles as dark matter candidates and derives relations between NC scale and dark matter masses.

Findings

Relic density calculations for singlet particles in NC space-time.

Derived bounds on NC scale consistent with dark matter observations.

Established relations between NC scale and dark matter mass.

Abstract

We extend the noncommutative (NC) standard model to incorporate singlet particles as cold dark matter. In the NC space-time, the singlet particles can be coupled to the U(1) gauge field in the adjoint representation. We Study the relic density of the singlet particles due to the NC induced interaction. Demanding either the singlet fermion or the singlet scalar to serve as cold dark matter and the NC induced interactions to be relevant to the dark matter production, we obtain the corresponding relations between the NC scale and the dark matter masses, which are consistent with some existing bounds.