講座主題：Two-Higgs Doublet模型中的相變研究
專家姓名：邊立功
工作單位：重慶大學
講座時間：2018年4月10日 10:00
講座地點：光電學院1511報告廳
主辦單位：煙臺大學光電信息科學技術學院
內容摘要：
We study the electroweak phase transition in the alignment limit of the CP-conserving two-Higgs-doublet model (2HDM) of Type I and Type II. The effective potential is evaluated at one-loop, where the thermal potential includes Daisy corrections and is reliably approximated by means of a sum of Bessel functions. Both 1-stage and 2-stage electroweak phase transitions are shown to be possible, depending on the pattern of the vacuum development as the Universe cools down. For the 1-stage case focused on in this paper, we analyze the properties of phase transition and discover that the field value of the electroweak symmetry breaking vacuum at the critical temperature at which the first order phase transition occurs is largely correlated with the vacuum depth of the 1-loop potential at zero temperature.
We demonstrate that a strong first order electroweak phase transition (SFOEWPT) in the 2HDM is achievable and establish benchmark scenarios leading to different testable signatures at colliders. In addition, we verify that an enhanced triple Higgs coupling (including loop corrections) is a typical feature of the SFOPT driven by the additional doublet. As a result, SFOEWPT might be able to be probed at the LHC and future lepton colliders through Higgs pair production.
主講人介紹：
2014年在南開大學獲得博士學位，2014-2016年間起在中國科學院理論物理所(ITP)從事博士后研究工作。2016年被聘請為重慶大學物理科學學院講師、碩士生導師,并于2017年獲得韓國中央大學研究教授的職位。主要工作集中在宇宙學早期相變，暗物質唯象學研究。共發表文章17篇。
