首 頁機構概況機構設置科研人才隊伍合作交流研究生教育博士后圖書館創新文化黨群園地院重點實驗室彭桓武中心信息公開
  學術活動
  您現在的位置:首頁 > 學術活動 > 專題學術報告/Seminar
(Seminar) A Portalino to the Twin Sector: Resolving the Cosmological Problem of the Twin Higgs Model
2019-12-30  【 】【打印】【關閉

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

 Seminar

Title

題目

 A Portalino to the Twin Sector: Resolving the Cosmological Problem of the Twin Higgs Model

Speaker

報告人

Di Liu

Affiliation

所在單位

New York University

Date

日期

2:00pm, Dec.30,2019

Venue

地點

ITP South Building 6620

Abstract

摘要

Extensions of the Standard Model are often highly constrained by cosmology. The presence of new states can  dramatically alter observed properties of the universe by the presence of additional matter or entropy. However,  the Portalino, a singlet fermion that marries gauge neutral fermion operators, can naturally help provide a portal  for entropy to return to the SM and to lift fermionic degrees of freedom in the Twin Sector. Together with spontaneous  breaking of the Z2 symmetry, there are new opportunities to confront the cosmological challenges of these models.  In this talk, I shall show how one can lift many of the light fields by breaking Z2 with a U(1)Y scalar and its Twin  partner. The introduction of Portalinos can lift the remaining degrees of freedom. We shall find that such models  are highly constrained by precision SM measurements, motivating moderate extensions beyond this. I will discuss  two, one with additional weak matter and another with additional colored matter. The weak model will involve  simple two Higgs doublet models on top of Z2 breaking. The strong model will involve the presence of new leptoquarks  and diquarks.

Contact Person

所內聯系人

Jing Shu
IE6.0瀏覽器,1024X768分辨率 版權所有 ? 中國科學院理論物理研究所
地址:北京市海淀區中關村東路55號 郵政編碼:100190
京ICP備05002865號】 京公網安備1101080094號
河南福彩网-首页