量子色动力学轴子畴壁问题的新禁闭力解决方案。

New confining force solution of the QCD axion domain-wall problem.

作者信息

Barr S M, Kim Jihn E

机构信息

Department of Physics and Astronomy, Bartol Research Institute, University of Delaware, Newark, Delaware 19716, USA.

Department of Physics, Kyung Hee University, 26 Gyeongheedaero, Dongdaemun-Gu, Seoul 130-701, Korea.

出版信息

Phys Rev Lett. 2014 Dec 12;113(24):241301. doi: 10.1103/PhysRevLett.113.241301. Epub 2014 Dec 9.

DOI:10.1103/PhysRevLett.113.241301

PMID:25541762

Abstract

The serious cosmological problems created by the axion-string-axion-domain-wall system in standard axion models are alleviated by positing the existence of a new confining force. The instantons of this force can generate an axion potential that erases the axion strings long before QCD effects become important, thus preventing QCD-generated axion walls from ever appearing. Axion walls generated by the new confining force would decay so early as not to contribute significantly to the energy in axion dark matter.

摘要

标准轴子模型中轴子-弦-轴子畴壁系统所产生的严重宇宙学问题，通过假定存在一种新的禁闭力而得到缓解。这种力的瞬子可以产生一个轴子势，在 QCD 效应变得重要之前很久就消除轴子弦，从而防止 QCD 产生的轴子壁出现。由新的禁闭力产生的轴子壁会衰变得非常早，以至于对轴子暗物质中的能量贡献不大。