标题： 从捕获到坍缩：重新审视中子星中费米子不对称暗物质的黑洞形成 显示英文标题

标题： From Capture to Collapse: Revisiting Black Hole formation by Fermionic Asymmetric Dark Matter in Neutron Stars

摘要： 费米子不对称暗物质（ADM）可以通过与中子星（NSs）组成成分的散射被捕获在中子星中。由于其不对称性质导致暗物质湮灭的缺失，使得ADM在中子星核心积累，可能达到足以超过钱德拉塞卡极限的密度，从而触发其引力坍缩成黑洞（BH），最终从内部吞噬中子星。因此，古老中子星的存在和观测为约束ADM的特性提供了一种方法。我们重新审视了在一系列模型中对费米子ADM的质量和与中子的散射截面的先前限制。我们仔细检查了文献中用于推导这些限制的常见简化假设。我们的分析包括对暗物质捕获、热化、黑洞形成、吸积和蒸发的改进处理。我们发现，一旦正确考虑这些效应，先前的结果可以放松几个数量级。 显示英文摘要

摘要： Fermionic asymmetric dark matter (ADM) can be captured in neutron stars (NSs) via scatterings with the star constituents. The absence of dark matter annihilation due to its asymmetric nature leads to ADM accumulation in the NS core, potentially reaching densities sufficient to exceed the Chandrasekhar limit and trigger its gravitational collapse into a black hole (BH), eventually consuming the NS from within. Therefore, the existence and observation of old neutron stars provides a means to constrain the properties of ADM. We revisit previous constraints on the mass and scattering cross section off neutrons of fermionic ADM across a class of models. We critically examine common simplifying approximations used in the literature to derive these limits. Our analysis includes improved treatments of dark matter capture, thermalization, BH formation, accretion, and evaporation. We find that previous results can be relaxed by a few orders of magnitude once these effects are properly accounted for.