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(diǎn):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,。