Asymmetric dark matter abundance including non-thermal production

Abstract

We investigate the relic abundance of asymmetric dark matter where the asymmetric dark matter is non–thermally produced from the decay of heavier particles in addition to the usual thermal production. We discuss the relic density of asymmetric dark matter including the decay of heavy particles in low-temperature scenarios. Here, we still assume that the Universe is radiation-dominated and there is asymmetry before the decay of heavy particles. We obtain an increased abundance of asymmetric dark matter when there is an additional contribution from the decay of heavier particles. Finally, we find the constraints on the asymmetry factor and annihilation cross-section using Planck data.