标题： 单重态冷暗物质的双光子湮灭源于非对易时空 显示英文标题

标题： Two-photon annihilation of singlet cold dark matters due to noncommutative space-time

摘要： 探测来自暗物质湮灭或衰变的宇宙射线，特别是伽马射线，是间接调查暗物质性质的一种方法。 在对易时空中，暗物质候选者（WIMPs）湮灭为光子是通过环修正进行的。 然而，在非对易时空中，WIMPs以及其他标准模型单态粒子可以直接与光子耦合。 在本文中，我们研究了非对易时空中单态WIMPs的双光子湮灭。 如果非对易相互作用与残留丰度相关，可以利用费米-LAT数据排除一些暗物质质量。 显示英文摘要

摘要： Detecting the cosmic rays, in particular gamma-ray, coming from the dark matter annihilation or decay is an indirect way to survey the nature of the dark matter. In the commutative space-time, the annihilation of the dark matter candidates (WIMPs) to photons proceeds through loop corrections. However, it is possible for WIMPs as well as the other standard model singlet particles to couple with photons directly in the noncommutative space-time. In this paper, we study two-photon annihilation of singlet WIMPs in the noncommutative space-time. If the noncommutative interactions are relevant to the relic abundance, one can exclude some dark matter masses using Fermi-Lat data.