暗光子门户暗物质与低温再加热
Dark photon portal dark matter with low-temperature reheating
浏览论文内容
中文总结 AI 辅助
本文研究低温再加热下暗光子门户暗物质产生，发现熵稀释使较小混合参数可行，并系统比较复标量、狄拉克和马约拉纳费米子三种暗物质场景的参数空间。
中文摘要 AI 辅助
暗光子 A' 被广泛认为是暗物质 χ 的媒介粒子。在传统的非共振基准场景中，当 m_A'/m_χ = 3 时，为匹配观测到的暗物质 relic 密度所需的动力学混合 ε 通常会被直接探测、间接探测、对撞机及其他相关实验的联合约束所排除。然而，如果暴胀子的延迟衰变产生低温再加热，额外的熵产生会稀释暗物质 relic 密度。因此，显著更小的 ε 就足以匹配观测，从而使暗物质能够逃脱当前多实验的约束界限。在本文中，我们研究了在暗光子 A' 门户框架下，低再加热温度 T_rh 对暗物质产生的影响，其中 A' 介导暗物质 χ 与标准模型粒子之间的相互作用。我们在联合实验约束下，系统地探索了复标量、狄拉克和马约拉纳费米子暗物质的可行且有前景的参数空间，并比较了这三种场景之间的差异。
英文摘要
The dark photon $A'$ is widely considered as the mediator of dark matter $χ$. In the conventional non-resonance benchmark scenario with $m_{A'}/m_χ=3$, the kinetic mixing $ε$ required to match the observed dark matter relic density is typically ruled out by the combined constraints from the direct detection, indirect detection, collider, and other relevant experiments. However, if a delayed decay of the inflaton creates the low-temperature reheating, the additional entropy production dilutes the dark matter relic density. As a result, a significantly smaller $ε$ becomes sufficient to match the observation, which allows the dark matter to escape the present multi-experimental bounds. In this paper, we investigate the dark matter production under the influence of a low reheating temperature $T_{\rm rh}$ within the dark photon $A^\prime$ portal framework, where $A^\prime$ mediates the interaction between dark matter $χ$ and the SM particles. We systematically explore the viable and promising parameter space for complex scalar, Dirac, and Majorana fermion dark matter under the combined experimental constraints, and compare the distinctions among these three scenarios.
发表机构
- School of Physics and Technology, University of Jinan（济南大学物理科学与技术学院）
- School of Physics and Electronic Engineering, Jining University（济宁学院物理与电气工程学院）
- Department of Physics and Institute of Theoretical Physics, Nanjing Normal University（南京师范大学物理系和理论物理研究所）
机构由 AI 辅助整理，请以论文原文为准。
