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arXiv 2404.08528hep-phastro-ph.COastro-ph.HE
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来自所有星系的超新星中微子助推暗物质

Supernova-Neutrino-Boosted Dark Matter from All Galaxies

Yen-Hsun Lin, Meng-Ru Wu

AI总结:

本研究拓展超新星中微子助推暗物质的概念,评估了高红移所有星系的弥散助推暗物质通量,得出大型中微子实验可达到的截面灵敏度,并验证了暗物质尖峰对两类探测的影响有限。

摘要:

近期有研究提出,源自SN1987a或下一次银河系超新星(SN)的超新星中微子(SN$\nu$)所产生的助推暗物质(BDM),可作为探测暗物质(DM)与标准模型轻子之间非零相互作用的新途径[Y.-H. Lin等人,Phys. Rev. Lett 130, 111002 (2023) 以及 Y.-H. Lin等人,Phys. Rev. D 108, 083013 (2023)]。在本快报中,我们拓展了这一概念,评估了当今来自更高红移所有星系的SN$\nu$ BDM弥散通量。我们表明,通过考虑这一弥散BDM(DBDM)成分,利用Super-Kamiokande(超级神冈)或Hyper-Kamiokande(顶级神冈)这类大型中微子实验,可获得亚MeV暗物质下与能量无关的DM-$\nu$和DM-电子截面乘积的最佳灵敏度,即$\sqrt{\sigma_{\chi\nu}\sigma_{\chi e}}\simeq \mathcal{O}(10^{-37})$ cm$^2$,这一结果优于从SN1987a得到的SN$\nu$ BDM约束估计值。我们还考察了星系中超大质量黑洞周围的暗物质尖峰的存在对SN$\nu$ BDM和DBDM的影响。我们的结果表明,DBDM和SN$\nu$ BDM两种探测手段对暗物质尖峰的不确定性质都具有鲁棒性,除非下一次银河系超新星恰好出现在沿其视线方向极靠近银心或正好在银心后方的位置。

英文摘要:

It has been recently proposed that the boosted dark matter (BDM) by supernova neutrinos (SN$ν$) from SN1987a or from the next Galactic supernova (SN) can serve as a novel component to probe nonvanishing interaction between dark matter (DM) and the standard model leptons [Y.-H. Lin et al., Phys. Rev. Lett 130, 111002 (2023) and Y.-H. Lin et al., Phys. Rev. D 108, 083013 (2023)]. In this Letter, we extend this concept and evaluate the present-day diffuse flux of SN$ν$ BDM originated from all galaxies at higher redshifts. We show that by considering this diffuse BDM (DBDM) component, the best sensitivity on the product of the energy-independent DM-$ν$ and DM-electron cross sections, $\sqrt{σ_{χν}σ_{χe}}\simeq \mathcal{O}(10^{-37})$ cm$^2$ for sub-MeV DM, can be obtained with large-size neutrino experiments such as Super-Kamiokande or Hyper-Kamiokande, surpassing the estimated SN$ν$ BDM bound from SN1987a. We also examine the impact due to the presence of DM spikes around the supermassive black holes in galaxies on SN$ν$ BDM and DBDM. Our results suggest that both the DBDM and the SN$ν$ BDM probes are robust to the uncertain properties of DM spikes, unless the next Galactic SN happens to occur at a location extremely close to or right behind the Galactic Center along the SN line of sight.

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