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arXiv 2402.08718hep-phastro-ph.GAastro-ph.HE
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利用银河系矮球状星系与超新星中微子限制中微子-暗物质相互作用

Constraining neutrino-DM interactions with Milky Way dwarf spheroidals and supernova neutrinos

Sean Heston, Shunsaku Horiuchi, Satoshi Shirai

AI总结:

本文利用银河系矮球状星系暗物质密度分布,通过超新星中微子散射导致的能量注入效应,给出了中微子-暗物质散射截面的新上限,并指出该约束强于以往结果。

摘要:

我们利用银河系矮球状星系暗物质密度分布的性质来限制中微子-暗物质散射截面。该限制来源于核坍缩超新星中微子与暗物质散射,作为一种能量注入形式,使暗物质密度分布能够从尖峰型轮廓转变为更平坦的轮廓。我们假设标准宇宙学模型,即暗能量加冷的、无碰撞且无自相互作用的暗物质。通过要求暗物质核心不损失过多质量,并且不超过恒星运动学给出的约束,我们给出了截面上限:当 $E_ν=15 \\, \mathrm{MeV}$ 且 $m_χ\lesssim130 \\, \mathrm{GeV}$ 时,$σ_{ν-\mathrm{DM}} \approx 3.4 \times 10^{-23} \\, \mathrm{cm^2}$;当 $E_ν=15 \\, \mathrm{MeV}$ 且 $m_χ\gtrsim130 \\, \mathrm{GeV}$ 时,$σ_{ν-\mathrm{DM}} \approx 3.2 \times 10^{-27} \left( \frac{m_χ}{1\\,\mathrm{GeV}}\right)^2\\, \mathrm{cm^2}$。这些限制比此前在这些能量下的界限更强。考虑重子反馈或宿主星系对暗物质分布的影响可以进一步加强该约束。

英文摘要:

We constrain the neutrino-dark matter cross section using properties of the dark matter density profiles of Milky Way dwarf spheroidal galaxies. The constraint arises from core-collapse supernova neutrinos scattering on dark matter as a form of energy injection, allowing the transformation of the dark matter density profile from a cusped profile to a flatter profile. We assume a standard cosmology of dark energy and cold, collisionless, and non-self-interacting dark matter. By requiring that the dark matter cores do not lose too much mass or overshoot constraints from stellar kinematics, we place an upper limit on the cross section of $σ_{ν-\mathrm{DM}}(E_ν=15 \, \mathrm{MeV}, m_χ\lesssim130 \, \mathrm{GeV}) \approx 3.4 \times 10^{-23} \, \mathrm{cm^2}$ and $σ_{ν-\mathrm{DM}}(E_ν=15 \, \mathrm{MeV}, m_χ\gtrsim130 \, \mathrm{GeV}) \approx 3.2 \times 10^{-27} \left( \frac{m_χ}{1\,\mathrm{GeV}}\right)^2\, \mathrm{cm^2}$, which is stronger than previous bounds for these energies. Consideration of baryonic feedback or host galaxy effects on the dark matter profile can strengthen this constraint.

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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