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arXiv 2108.00583hep-phastro-ph.HE
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Cosmic-ray上散射非弹性暗物质

Cosmic-ray upscattered inelastic dark matter

Nicole F. Bell, James B. Dent, Bhaskar Dutta, Sumit Ghosh, Jason Kumar, Jayden L. Newstead, Ian M. Shoemaker

摘要:

银河系暗物质晕的非相对论性光成分逃避了直接探测的限制,因为它们缺乏产生可观测反冲的动能。然而,宇宙射线可以将暗物质向上散射到相当大的能量,使直接探测实验能够进入以前无法到达的参数空间中非常低质量的暗物质区域。在这项工作中,我们扩展了宇宙射线暗物质形式主义的非弹性暗物质模型,并表明以前无法访问的区域的质量分裂参数空间可以探测。传统的非相对论性晕暗物质的直接探测仅限于$δ\sim10~\mathrm{keV}$的质量分裂,并且是高度质量依赖的。我们发现,包括宇宙射线上散射的影响,可以扩展到$δ\sim100~\mathrm{MeV}$的质量分裂的范围,并保持在低得多的暗物质质量达到。

英文摘要:

Light non-relativistic components of the galactic dark matter halo elude direct detection constraints because they lack the kinetic energy to create an observable recoil. However, cosmic-rays can upscatter dark matter to significant energies, giving direct detection experiments access to previously unreachable regions of parameter-space at very low dark matter mass. In this work we extend the cosmic-ray dark matter formalism to models of inelastic dark matter and show that previously inaccessible regions of the mass-splitting parameter space can be probed. Conventional direct detection of non-relativistic halo dark matter is limited to mass splittings of $δ\sim10~\mathrm{keV}$ and is highly mass dependent. We find that including the effect of cosmic-ray upscattering can extend the reach to mass splittings of $δ\sim100~\mathrm{MeV}$ and maintain that reach at much lower dark matter mass.

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