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(Seminar) Cosmological relaxation of electroweak hierarchy
2019-01-07  【 】【打印】【关闭

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

Chinese Academy of Sciences

Seminar

Title

题目

Cosmological relaxation of electroweak hierarchy

Speaker

报告人

王少江

Affiliation

所在单位

Tufts University

Date

日期

2019年1月7日14:00

Venue

地点

Room 6420, ITP NEW BUILDING

Abstract

摘要

A new relaxion mechanism is proposed, where a small electroweak scale is preferably selected earlier than the larger one due to potential instability, different from previously proposed stopping mechanisms by either Hubble friction from increasing periodic barrier or thermal friction from gauge boson productions. A sub-Planckian field excursion of axion can be achieved without violating the bound on the e-folding number from quantum gravity consideration, and our relaxion can be identified as QCD axion, preserving the Peccei-Quinn solution to the strong CP problem as well as making up all the cold dark matter in our current Universe. 

Contact Person

所内联系人

蔡荣根
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