Conservative Constraints on dark matter annihilation into gamma rays
Conservative Constraints on dark matter annihilation into gamma rays
复制标题
暗物质湮灭成伽马射线的保守约束
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
H. Yuksel
中科院分区：
文献类型：
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作者：
Gregory D. Mack;T. Jacques;J. Beacom;N. Bell;H. Yuksel
利用银河系、仙女座星系（M31）和宇宙背景观测的γ射线数据，我们计算了暗物质质量在很宽范围内对单能γ射线的自湮灭截面的保守上限.我们专注于伽马伽马最终状态，因为它将是暗物质湮灭的一个非常清晰的标志。由于我们对横截面的约束受到天体物理不确定性的影响，我们在输入选择和分析方法上是保守的，并展示了我们的结果如何依赖于这些。使用我们的上限暗物质湮灭横截面的伽马射线，和一个保守的假设的分支比单能伽马射线，我们定义的总截面的上限和其他限制。
Using gamma-ray data from observations of the Milky Way, Andromeda (M31), and the cosmic background, we calculate conservative upper limits on the dark matter self-annihilation cross section to monoenergetic gamma rays, _{gamma gamma}, over a wide range of dark matter masses. We focus on the gamma gamma final state, as it would be a very clean signature of dark matter annihilation. As our constraints on the cross section are affected by astrophysical uncertainties, we are conservative in our input choices and analysis methods and show how our results depend on these. Using our upper limits on the dark matter annihilation cross section to gamma rays, and a conservative assumption about the branching ratio to monoenergetic gamma rays, we define upper limits on the total cross section and compare to other constraints.