论文标题
改善紧凑型星星中暗物质捕获的处理
Improved Treatment of Dark Matter Capture in Compact Stars
论文作者
论文摘要
紧凑型恒星对象有望测试暗物质（DM）的性质。这些恒星残留物的强力场捕获的DM在碰撞期间将动能传递给恒星。这可能会产生各种效果，例如旧紧凑型恒星的异常加热。在任何涉及恒星中DM积聚的情况下，DM捕获率的正确计算是在DM相互作用上得出界限的关键。我们改进了白矮人（WDS）和中子星（NSS）的依赖近似值的以前的计算。我们说明了恒星结构，引力焦点，相对论运动学，保里的阻塞，现实的形式和强烈的相互作用（NSS）。考虑DM通过在WDS中散射离子或退化电子来捕获，我们表明DM富含DM的旧WD可以探测DM核电和DM - 电子散射的难以捉摸的子GEV质量制度。在NSS中，DM可以通过与强烈相互作用的重子或相对论瘦素的碰撞来捕获。我们将NS敏感性投射到DM核苷和DM-Lepton散射截面，这些横截面大大超过了直接检测实验的敏感性，尤其是对于低质量DM。
Compact stellar objects are promising cosmic laboratories to test the nature of dark matter (DM). DM captured by the strong gravitational field of these stellar remnants transfers kinetic energy to the star during the collision. This can have various effects such as anomalous heating of old compact stars. The proper calculation of the DM capture rate is key to derive bounds on DM interactions in any scenario involving DM accretion in a star. We improve former calculations, which rely on approximations, for both white dwarfs (WDs) and neutron stars (NSs). We account for the stellar structure, gravitational focusing, relativistic kinematics, Pauli blocking, realistic form factors, and strong interactions (NSs). Considering DM capture by scattering off either ions or degenerate electrons in WDs, we show that old WDs in DM-rich environments could probe the elusive sub-GeV mass regime for both DM-nucleon and DM-electron scattering. In NSs, DM can be captured via collisions with strongly interacting baryons or relativistic leptons. We project the NS sensitivity to DM-nucleon and DM-lepton scattering cross sections which greatly exceeds that of direct detection experiments, especially for low mass DM.
