论文标题
搜索余辉：超新星中微子增强的轻暗物质
Searching for Afterglow: Light Dark Matter Boosted by Supernova Neutrinos
论文作者
论文摘要
进行了新的分析，并结合了飞行时间（TOF）信息，以研究暗物质（DM）与标准模型颗粒的相互作用。在超新星（SN）爆炸之后，带有质量$M_χ\ lyssim \ Mathcal {o}（{\ rm mev}）$的DM可以通过Sn NeTrinos（Sn $ν$）来提高HALO中的DM。 Sn $ν$增强的DM（BDM）与TOF一起到达地球，仅取决于$m_χ$，并且独立于横截面。这些BDM可以与低背景实验中的检测器目标相互作用，并在Sn $ν$到达后表现为余辉事件。 BDM事件的特征性TOF光谱可以导致$M_χ$的巨大背景抑制和独特的确定。 $ \ sqrt {σ_{χe}σ_{χν}} $上的新横截面约束是从SN1987A派生的大麦哲伦云中，并带有来自Kamiokande和Super-Kamiokande实验的数据。预计将对下一个带有超级kamiokande的下一个银河SN的潜在敏感性。该分析将现有界限扩展到$ \ sqrt {σ_{χe}σ_{χν}} $上的$r_χ=σ_{χν}/σ_{χe} $上。特别是，对于$M_χ<\ Mathcal {o}（100 \，{\ rm kev}）$，对$m_χ<\ mathcal {o} \simσ__{χvν} $乘以1-3个数量级。讨论了将其他天体物理系统中的TOF信息与其他DM候选者一起探测外来物理的前景。
A novel analysis is performed, incorporating time-of-flight (TOF) information to study the interactions of dark matter (DM) with standard model particles. After supernova (SN) explosions, DM with mass $m_χ\lesssim\mathcal{O}({\rm MeV})$ in the halo can be boosted by SN neutrinos (SN$ν$) to relativistic speed. The SN$ν$ boosted DM (BDM) arrives on Earth with TOF which depends only on $m_χ$ and is independent of the cross section. These BDMs can interact with detector targets in low-background experiments and manifest as afterglow events after the arrival of SN$ν$. The characteristic TOF spectra of the BDM events can lead to large background suppression and unique determination of $m_χ$. New cross section constraints on $\sqrt{σ_{χe} σ_{χν}}$ are derived from SN1987a in the Large Magellanic Cloud with data from the Kamiokande and Super-Kamiokande experiments. Potential sensitivities for the next galactic SN with Hyper-Kamiokande are projected. This analysis extends the existing bounds on $\sqrt{σ_{χe}σ_{χν}}$ over a broad range of $r_χ=σ_{χν}/σ_{χe}$. In particular, the improvement is by 1-3 orders of magnitude for $m_χ<\mathcal{O}(100\,{\rm keV})$ for $σ_{χe}\simσ_{χν}$. Prospects of exploiting TOF information in other astrophysical systems to probe exotic physics with other DM candidates are discussed.
