报告题目：The collapsing domain walls in the BSM new physics

报告人：陈宁  副教授（南开大学）

报告时间：2020 年 10 月 8 日（周四）15：30

报告地点：在线报告（ 腾讯会议 ID :  418 756 340）

报告摘要：

Recently, we study the possible domain wall solutions in new physics beyond the Standard Model (BSM). The domain wall is one type of the topological defects, which can appear when there is degenerate vacua associated with the spontaneous symmetry breaking. I will show that the domain walls can arise in some of the well-studied new physics models, such as the complex singlet (cxSM) extension or the two-Higgs-doublet (2HDM) extension to the Standard Model. Cosmologically, their existences are severely constrained by the CMB observation, and are ruled out by the so-called Zel'dovich-Kobzarev-Okun bound. Fortunately, such domain walls can be unstable when the associated symmetry is approximate. 

报告人简介：陈宁：  2006-2011 Stony Brook 获得博士学位，2011-2014 清华大学博士后，2014-2017 中国科学技术大学特任副研究员，2017 -2018 北京科技大学，2018-至今 南开大学副教授。