Strong CP problem and axion dark matter with small instantons

被引：24

作者：

Kitano, Ryuichiro ^{[1
,2
]}

Yin, Wen ^{[3
]}

机构：

[1] KEK, IPNS, Theory Ctr, Tsukuba, Ibaraki 3050801, Japan

[2] Grad Univ Adv Studies Sokendai, Dept Particle & Nucl Phys, Tsukuba, Ibaraki 3050801, Japan

[3] Univ Tokyo, Fac Sci, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2021年 / 2021卷 / 07期

关键词：

Beyond Standard Model; Compactification and String Models; Cosmology of Theories beyond the SM; CP violation; QCD; CONSERVATION; COSMOLOGY; MASS; COMPUTATION; CONSTRAINTS; INVARIANCE;

D O I：

10.1007/JHEP07(2021)078

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

The axion mass receives a large correction from small instantons if the QCD gets strongly coupled at high energies. We discuss the size of the new CP violating phases caused by the fact that the small instantons are sensitive to the UV physics. We also discuss the effects of the mass correction on the axion abundance of the Universe. Taking the small-instanton contributions into account, we propose a natural scenario of axion dark matter where the axion decay constant is as large as 10(15-16) GeV. The scenario works in the high-scale inflation models.

引用

页数：28

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