论文标题
轻型暗物质直接检测的有吸引力的场景
An Attractive Scenario for Light Dark Matter Direct Detection
论文作者
论文摘要
如果DM的速度远高于$ v \ sim 10^{ - 3} $，则通过电子后坐力直接检测轻度暗物质（DM），通过电子后坐力的直接检测可以有效。我们指出，如果有大量的普通物质产生的远距离吸引力，即重子或电子，则可以将DM加速到地球并达到地球表面附近的速度$ v \ sim 0.1 $。在这种“有吸引力的场景”中，所有DM将在达到实验室直接检测设备时将所有DM提升到高速度。此外，吸引力导致地球上的DM数量密度增强，进一步促进了DM检测。我们阐明了这种情况对电子后坐力直接检测实验的含义，并找到可能导致潜在信号的参数，同时与恒星冷却和其他边界保持一致。我们的方案可能可以解释Xenon1t实验在$ \ sim $ kev Energy制度中报告的电子后坐力信号的最近过量，以及非标准恒星冷却的提示。
Direct detection of light dark matter (DM), below the GeV scale, through electron recoil can be efficient if DM has a velocity well above the virial value of $v\sim 10^{-3}$. We point out that if there is a long range attractive force sourced by bulk ordinary matter, i.e. baryons or electrons, DM can be accelerated towards the Earth and reach velocities $v\sim 0.1$ near the Earth's surface. In this "attractive scenario," all DM will be boosted to high velocities by the time it reaches direct detection apparatuses in laboratories. Furthermore, the attractive force leads to an enhanced DM number density at the Earth facilitating DM detection even more. We elucidate the implications of this scenario for electron recoil direct detection experiments and find parameters that could lead to potential signals, while being consistent with stellar cooling and other bounds. Our scenario can potentially explain the recent excess in electron recoil signals reported by the XENON1T experiment in the $\sim$ keV energy regime as well as the hint for non-standard stellar cooling.
