講座主題：The Self-Organized Criticality of Dark Matter in the Early Universe
專家姓名：金明杰
工作單位：中科院高能所
講座時間：2024年11月15日10:00-11:30
講座地點：化北322報告廳
主辦單位：煙臺大學(xué)物理與電子信息學(xué)院
內(nèi)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 χ?→?? in the premise of the instability of dark partner ?, 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.
主講人介紹：
金明杰博士，本科畢業(yè)于蘭州大學(xué)，碩士畢業(yè)于浙江大學(xué)，博士畢業(yè)于中國科學(xué)院高能物理研究所，之后在北京師范大學(xué)做博士后研究。研究方向是高能粒子物理和暗物質(zhì)唯象理論。
