Singlet particles as cold dark matter in θ-exact non-commutative space-time

Abstract

First, singlet dark matter annihilation into pair charged fermions and pair  bosons was studied to the first order of non-commutativity parameter in perturbative model. Our results are different from the results reported in some previous studies. Then the problem is formulated in -exact non-commutative space-time and non-perturbative model, then the exact results are presented

Keywords

• dark matter
• singlet fermion
• singlet scalar
• non-commutative space-time