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  Location: Home >  Research Activities >  Seminar
QCD axion and small scale inflation
2018-08-06     Text Size:  A

CAS Key Laboratory of Theoretical Physics

Institute of Theoretical Physics

 Chinese Academy of Sciences

Seminar

Title

题目

QCD axion and small scale inflation

Speaker

报告人

Wen Yin  (殷文)

Affiliation

所在单位

IHEP, Beijing

Date

日期

201886日(周一)下午330

Venue

地点

Conference Room 6420, ITP new building

Abstract

摘要

After a brief review on the strong CP and QCD axion, we show that the upper bound of the classical QCD axion window can be significantly relaxed for low-scale inflation. If the Gibbons-Hawking temperature during inflation is lower than the QCD scale, the initial QCD axion misalignment angle follows the Bunch-Davies distribution. The distribution is peaked at the strong CP conserving minimum if there is no other light degree of freedom contributing to the strong CP phase. As a result, the axion over-production problem is significantly relaxed even for an axion decay constant larger than 10^{12} GeV.

Contact person

所内联系人

杨金民

 

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