講座主題：Two-Higgs Doublet模型中的相變研究
專(zhuān)家姓名：邊立功
工作單位：重慶大學(xué)
講座時(shí)間：2018年4月10日 10:00
講座地點(diǎn)：光電學(xué)院1511報(bào)告廳
主辦單位：煙臺(tái)大學(xué)光電信息科學(xué)技術(shù)學(xué)院
內(nèi)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(kāi)大學(xué)獲得博士學(xué)位，2014-2016年間起在中國(guó)科學(xué)院理論物理所(ITP)從事博士后研究工作。2016年被聘請(qǐng)為重慶大學(xué)物理科學(xué)學(xué)院講師、碩士生導(dǎo)師,并于2017年獲得韓國(guó)中央大學(xué)研究教授的職位。主要工作集中在宇宙學(xué)早期相變，暗物質(zhì)唯象學(xué)研究。共發(fā)表文章17篇。
