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arXiv 1703.04043hep-ph
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暗物质的多散射恒星俘获

Multiscatter stellar capture of dark matter

Joseph Bramante, Antonio Delgado, Adam Martin

备注：
20 pages, 4 figures, corrected typos and numerical error in Fig. 2, note added
发表信息：
Phys. Rev. D 96, 063002 (2017)
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摘要：

暗物质可以通过在恒星中被捕获并随后湮灭而被发现。通常假设暗物质是在恒星的一次散射事件后被捕获的，然而这种假设在重暗物质中被打破，它需要与恒星多次碰撞才能失去足够的动能被捕获。我们分析计算多个散射如何改变捕获率的暗物质，并确定参数空间的影响是最大的。使用这些结果，然后，我们展示了如何多散射捕获的暗物质紧凑型恒星可以用来探测重（$m_X >$ TeV）暗物质与非常小的暗物质-核子散射截面。作为一个例子，它演示了如何测量在银河系的中心的老中子星的温度提供灵敏度高质量的暗物质与暗物质-核子散射截面小于氙直接检测中微子地板。

英文摘要：

Dark matter may be discovered through its capture in stars and subsequent annihilation. It is usually assumed that dark matter is captured after a single scattering event in the star, however this assumption breaks down for heavy dark matter, which requires multiple collisions with the star to lose enough kinetic energy to become captured. We analytically compute how multiple scatters alter the capture rate of dark matter and identify the parameter space where the affect is largest. Using these results, we then show how multiscatter capture of dark matter on compact stars can be used to probe heavy ($m_X >$ TeV) dark matter with remarkably small dark matter-nucleon scattering cross-sections. As one example, it is demonstrated how measuring the temperature of old neutron stars in the Milky Way's center provides sensitivity to high mass dark matter with dark matter-nucleon scattering cross-sections smaller than the xenon direct detection neutrino floor.

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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