| 活动类型： | 学术活动 |
|---|---|
| 活动名称： | 学术报告：Probing Reheating with Graviton Bremsstrahlung |
| 地点： | 中关村-7号楼401会议室 |
| 主讲人： | 储晓勇 |
| 联系人： | 储晓勇 |
| 联系方式： | 18210733767 |
| 开始时间： | 2024-08-01 10:00 |
| 结束时间： | 2024-08-01 12:00 |
| 说明: |
Reheating is a theory explaining the transition of the Universe from the end of inflation to the radiation phase before Big Bang nucleosynthesis (BBN). Probing the physics before BBN is challenging because the background is not transparent to usual messengers like photons or neutrinos. However, gravitational waves (GWs) serve as a very promising portal. In this talk, I will discuss a simple and inevitable stochastic GW spectrum resulting from graviton bremsstrahlung during reheating. I will demonstrate the dependence of GWs on the shape of the inflaton potential as well as the type of inflaton-matter coupling. Finally, I will highlight the potential of future high-frequency GW detection in probing the dynamics of reheating, which could potentially shed light on the unknown physics before BBN. |