Relic Density of Asymmetric Dark Matter in Modified Cosmological Scenarios

• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2018,（11）
• 页码范围: 602-608
• 页数: 7页
• 语种: 英文
• DOI: 10.1088/0253-6102/70/5/602

摘要

We discuss the relic abundance of asymmetric Dark Matter particles in modified cosmological scenarios where the Hubble rate is changed with respect to the standard cosmological scenario.The modified Hubble rate leaves its imprint on the relic abundance of asymmetric Dark Matter particles if the asymmetric Dark Matter particles freezeout in this era.For generality we parameterize the modification of the Hubble rate and then calculate the relic abundance of asymmetric Dark Matter particles and anti-particles.We find the abundances for the Dark Matter particles and antiparticles are enhanced in the modified cosmological models.The indirect detection signal is possible for the asymmetric Dark Matter particles due to the increased annihilation rate in the modified cosmological models.Applying Planck data,we find the constraints on the parameters of the modified cosmological models.