讲座主题：The Self-Organized Criticality of Dark Matter in the Early Universe

专家姓名：金明杰

工作单位：中科院高能所

讲座时间：2024年11月15日10:00-11:30

讲座地点：化北322报告厅

主办单位：欧宝官方app下载物理与电子信息学院

内容摘要：

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.

主讲人介绍：

金明杰博士，本科毕业于兰州大学，硕士毕业于浙江大学，博士毕业于中国科学院高能物理研究所，之后在北京师范大学做博士后研究。研究方向是高能粒子物理和暗物质唯象理论。