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| QCD axion and small scale inflation |
| 2018-08-06
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CAS Key Laboratory of Theoretical Physics |
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Institute of Theoretical Physics |
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Chinese Academy of Sciences |
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Seminar |
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Title
题目 |
QCD axion and small scale inflation |
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Speaker
报告人 |
Wen Yin (殷文) |
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Affiliation
所在单位 |
IHEP, Beijing |
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Date
日期 |
2018年8月6日（周一）下午3：30 |
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Venue
地点 |
Conference Room 6420, ITP new building |
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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. |
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Contact person
所内联系人 |
杨金民 | |
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