发表机构
School of Physics, Institute for Research in Fundamental Sciences (IPM)（基础科学研究所物理学院）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
研究活跃星系核中高能中微子与超大质量黑洞周围暗物质相互作用导致的通量衰减，通过结合观测推导中微子暗物质散射截面界限，发现媒介粒子质量等微观物理参数细节影响衰减，特定情况下可放宽界限。
AI 中文摘要
活跃星系核（AGNs）中产生的高能中微子与超大质量黑洞周围密集尖峰中的暗物质（DM）粒子之间的相互作用可能导致通量衰减。结合对至少四个AGNs可观通量的观测，已用于推导中微子暗物质散射截面的界限。研究表明，衰减强烈依赖于微观物理参数的细节。特别是如果媒介粒子是质量远小于中微子和暗物质质心能量的矢量玻色子，中微子的能量损失以及通量衰减将可忽略不计，从而放宽了界限。
英文摘要
Interactions between high energy neutrinos produced in active galactic nuclei (AGNs) and the dark matter (DM) particles in the dense spike around the supermassive black holes may lead to attenuation of the flux. This consideration along with the observation of a sizeable flux from at least four AGNs have been used to derive bounds on the neutrino dark matter scattering cross section \cite{Cline:2022qld}. We show that the attenuation strongly depends on the details of the microphysics parameters. In particular if the mediator is a vector boson with a mass much smaller than the center of mass energy of the neutrino and dark matter, the energy loss of the neutrino and therefore the flux attenuation will be negligible so the upper bound on the cross section in this limit can be considerably relaxed.
Comments2 pages; v3: reference added, typo corrected, a note added on arXiv:2608.17236
