标题： 不对称暗物质和索末菲增强 显示英文标题

标题： Asymmetric Dark Matter and Sommerfeld Enhancement

摘要： 我们表明，具有长程相互作用的不对称暗物质的残留密度受到索末菲增强的影响。 不对称暗物质的湮灭截面由于索末菲效应而增强。 这导致残留密度减少。 利用普朗克数据，得到了达到观测到的暗物质密度所需的不对称因子和耦合的约束。 我们推导了在s波和p波湮灭情况下不对称暗物质的质量上限。 显示英文摘要

摘要： We show that the relic density of asymmetric dark matter with long-range interactions is affected by the Sommerfeld enhancement. The annihilation cross section of asymmetric dark matter is enhanced due to the Sommerfeld effect. It results the relic density is decreased. Using the Planck date, the constraints on the asymmetry factor and coupling required to attain the observed dark matter density are obtained. We derive the upper bounds on the mass for asymmetric dark matter in s-wave and p-wave annihilation cases.