The strong CP problem

被引：4
|
作者：
Sikivie, Pierre [1 ]
机构：
[1] Univ Florida, Dept Phys, Gainesville, FL 32611 USA
来源：
COMPTES RENDUS PHYSIQUE | 2012年 / 13卷 / 02期
关键词：
QCD; CP; Axion; INVISIBLE AXION; STRONG P; QUANTUM CHROMODYNAMICS; NATURAL SUPPRESSION; WEAK-INTERACTION; HARMLESS AXION; T-INVARIANCE; GAUGE-THEORY; LIGHT BOSON; VIOLATION;
D O I：
10.1016/j.crhy.2011.10.002
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
QCD depends on an extra parameter (theta) over bar. When (theta) over bar not equal 0, P and CP are violated. Because the strong interactions conserve P and CP. (theta) over bar must be very small, of order 10(-10) or less. However, within the Standard Model, (theta) over bar is expected to be of order one. This puzzle is called the strong CP problem. Possible solutions are briefly described. (C) 2011 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：176 / 179
页数：4
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