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arXiv 1207.3971hep-phastro-ph.CO
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来自gamma-ray线的环诱导暗物质直接探测信号

Loop-induced dark matter direct detection signals from gamma-ray lines

Mads T. Frandsen, Ulrich Haisch, Felix Kahlhoefer, Philipp Mertsch, Kai Schmidt-Hoberg

摘要:

最近提出了改进的极限以及暗物质湮灭为伽马射线的试探性声明。在假设暗物质与原子核之间没有耦合的情况下,我们研究了暗物质湮灭为两个光子的直接探测截面。我们发现一个惊人的非标准反冲光谱由于不同的破坏性干扰贡献的暗物质核散射截面。虽然在s波湮灭的情况下,直接检测实验的电流灵敏度不足以与间接检测搜索竞争,但对于p波湮灭,直接搜索的约束是可比的。这将允许测试暗物质与p波湮灭的情况下,预测一个大的双光子湮灭截面在下一代的实验。

英文摘要:

Improved limits as well as tentative claims for dark matter annihilation into gamma-ray lines have been presented recently. We study the direct detection cross section induced from dark matter annihilation into two photons in a model-independent fashion, assuming no additional couplings between dark matter and nuclei. We find a striking non-standard recoil spectrum due to different destructively interfering contributions to the dark matter nucleus scattering cross section. While in the case of s-wave annihilation the current sensitivity of direct detection experiments is insufficient to compete with indirect detection searches, for p-wave annihilation the constraints from direct searches are comparable. This will allow to test dark matter scenarios with p-wave annihilation that predict a large di-photon annihilation cross section in the next generation of experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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