The Self-Organized Criticality of Dark Matter in the Early Universe

报告人简介：

金明杰博士，本科毕业于兰州大学，硕士毕业于浙江大学，博士毕业于 ，之后在北京师范大学做博士后研究，现就职于荆楚理工学院。研究方向是高能粒子物理和暗物质唯象理论。

报告时间/地点：

2025年11月5日，多学科楼226

报告摘要：

In this talk, we propose a new mechanism for dark matter freeze-out that results in the self-organized criticality in dark matter production, wherein the final relic abundance is independent of initial inputs, in analogy to scale invariance in other realms of non-equilibrium physics. The dynamic of self-organized is triggered through a semi-annihilation process χϕ→ϕϕ in the premise of the instability of dark partner ϕ, where χ is the dark matter candidate. The relic abundance can be analytically ascertained when the dark partner is slightly heavier than the dark matter, which permits a substantially heavy dark matter mass without violating unitarity bounds. We demonstrate that this process provides a bridge between the freeze-in and freeze-out mechanisms, and that the intricate dynamics of self-organized criticality can be actualized in a thermal dark sector bath.