题目：Superheavy Dark Matter Production from Symmetry Restoration First-Order Phase Transition During Inflation
报告人：周思益
时 间：2022年10月14日（星期五）14:00
地 点：腾讯会议：163-917-463
邀请人：边立功
报告人介绍：
周思益，2014年本科毕业于中国科大，同年进入香港科技大学读博士，2019年进入斯德哥尔摩大学做一期博后。2021年至今在神户大学做二期博后。主要研究引力波以及宇宙对撞机物理。
报告摘要：
We propose a scenario where superheavy dark matter (DM) can be produced via symmetry restoration first-order phase transition during inflation triggered by the evolution of the inflaton field. The phase transition happens in a spectator sector coupled to the inflaton field. During the phase transition, the spectator field tunnels from a symmetry-broken vacuum to a symmetry-restored vacuum. The massive particles produced after bubble collisions are protected against decaying by the restored symmetry and may serve as a DM candidate in the later evolution of the Universe. We show that the latent heat released during the phase transition can be sufficient to produce the DM relic abundance observed today. In addition, accompanied with the super heavy DM, this first-order phase transition also produces gravitational waves detectable via future gravitational wave detectors.
