Lin Yen-Hsun, Wu Meng-Ru
<a href="https://ror.org/01tpvdq80">Institute of Physics, Academia Sinica</a>, Taipei 115, Taiwan.
<a href="https://ror.org/01hfpy566">Institute of Astronomy and Astrophysics, Academia Sinica</a>, Taipei 106, Taiwan.
Phys Rev Lett. 2024 Sep 13;133(11):111004. doi: 10.1103/PhysRevLett.133.111004.
It has been recently proposed that the boosted dark matter (BDM) by supernova neutrinos (SNν) 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)PRLTAO0031-900710.1103/PhysRevLett.130.111002 and Y.-H. Lin et al., Phys. Rev. D 108, 083013 (2023)PRVDAQ2470-001010.1103/PhysRevD.108.083013]. In this Letter, we extend this concept and evaluate the present-day diffuse flux of SNν 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}]≃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 SNν BDM bound from SN1987a. We also examine the impact due to the presence of DM spikes around the supermassive black holes in galaxies on SNν BDM and DBDM. Our results suggest that both the DBDM and the SNν 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.
最近有人提出，来自1987a超新星或下一次银河系超新星（SN）的超新星中微子（SNν）增强的暗物质（BDM）可以作为一种新的成分，用于探测暗物质（DM）与标准模型轻子之间的非零相互作用[林义惠等人，《物理评论快报》130, 111002 (2023)PRLTAO0031 - 900710.1103/PhysRevLett.130.111002以及林义惠等人，《物理评论D》108, 083013 (2023)PRVDAQ2470 - 001010.1103/PhysRevD.108.083013]。在本快报中，我们扩展了这一概念，并评估了来自更高红移处所有星系的SNν BDM的当前漫射通量。我们表明，通过考虑这种漫射BDM（DBDM）成分，对于亚兆电子伏特的暗物质，在能量无关的DM - ν和DM - 电子截面乘积sqrt[σ_{χν}σ_{χe}]≃O(10^{-37}) cm²上，使用大型中微子实验如超级神冈探测器或超超级神冈探测器可以获得最佳灵敏度，超过了从1987a超新星估计的SNν BDM界限。我们还研究了星系中超大质量黑洞周围暗物质尖峰的存在对SNν BDM和DBDM的影响。我们的结果表明，除非下一次银河系超新星恰好发生在沿着超新星视线极其靠近银河系中心或就在银河系中心后方的位置，否则DBDM和SNν BDM探测器对暗物质尖峰的不确定性质都是稳健的。
