标题： 暗物质子GeV级费米子来源于DarkSide-50的蒸发原始黑洞 显示英文标题

标题： Fermionic sub-GeV Dark Matter from evaporating Primordial Black Holes at DarkSide-50

摘要： 我们利用DarkSide-50实验的离子信号-only数据集，对该数据集对应的($12202\pm180$) ${\rm kg\: d}$暗物质曝光进行了原初黑洞（PBH）蒸发增强暗物质的搜索。 我们重点关注质量范围在[$10^{14},\,10^{16}$]克之间的PBH蒸发，这些PBH产生动能为亚GeV的狄拉克费米子形式的暗物质粒子。 这些相对论性粒子，能量高达数百MeV，对于质量低于 $\mathcal{O}(100)$ MeV的情况可以产生可检测信号。 未观察到信号使我们能够设定与宇宙学观测和直接探测宇宙射线增强暗物质搜索互补的限制条件。 显示英文摘要

摘要： We present a search for boosted dark matter from Primordial Black Holes (PBH) evaporation using the DarkSide-50 ionization-signal-only dataset corresponding to the experiment's ($12202\pm180$) ${\rm kg\: d}$ exposure. We focus on evaporation of PBHs with masses in the range [$10^{14},\,10^{16}$] g producing Dirac fermionic dark matter particles with sub-GeV kinetic energy. These relativistic particles, with energies up to hundreds of MeV, can generate detectable signals for masses below $\mathcal{O}(100)$ MeV. The absence of a signal enables setting complementary limits to those derived from cosmological observations and direct detection searches for cosmic ray-boosted dark matter.