Comment on “Multiscatter stellar capture of dark matter”
Comment on “Multiscatter stellar capture of dark matter”
复制标题
对“暗物质的多散射恒星捕获”的评论
DOI：
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Saiyang Zhang
中科院分区：
文献类型：
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作者：
Cosmin Ilie;J. Pilawa;Saiyang Zhang
Bramante，Delgado和Martin [Phys. Rev. D96，063002（2017）.，BDM 17]以一种非常重要的方式扩展了暗物质（DM）捕获的分析形式，原则上允许使用紧凑的天体物理对象，如中子星（NS）作为暗物质探测器。在本文中，我们指出在暗物质中子散射截面σ_{nX}$与暗物质质量m_{X}$的关系中存在一个区域，在这个区域中，这种方法的约束能力丧失了。这对应于NS必须具有的最高温度（$T_{crit}$），以便用作暗物质探测器。此外，我们指出了BDM 17中的几个错别字和错误，这些错误并没有严重影响他们的结论。此外，我们提供了半解析近似的总捕获率的任意质量的暗物质粒子的各种限制制度。这些解析近似被用来验证我们的数值结果。
Bramante, Delgado, and Martin [Phys. Rev. D96, 063002(2017)., hereafter BDM17] extended the analytical formalism of dark matter (DM) capture in a very important way, which allows, in principle, the use of compact astrophysical objects, such as neutron stars (NS), as dark matter detectors. In this comment, we point out the existence of a region in the dark matter neutron scattering cross section $(sigma_{nX})$ vs. dark matter mass $(m_{X})$ where the constraining power of this method is lost. This corresponds to a maximal temperature ($T_{crit}$) the NS has to have, in order to serve as a dark matter detector. In addition, we point out several typos and errors in BDM17 that do not affect drastically their conclusions. Moreover, we provide semi-analytical approximations for the total capture rates of dark matter particle of arbitrary mass for various limiting regimes. Those analytical approximations are used to validate our numerical results.