Dynamical Higgs mechanism without elementary scalars: A lesson from instantons

被引：31

作者：

Diakonov, D ^{[1
]}

Forkel, H ^{[1
]}

Lutz, M ^{[1
]}

机构：

[1] ECT,I-38050 VILLAZZANO,TRENTO,ITALY

来源：

PHYSICS LETTERS B | 1996年 / 373卷 / 1-3期

关键词：

D O I：

10.1016/0370-2693(96)00143-8

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The generation of gauge-dependent fermion vacuum condensates in Yang-Mills theory would dynamically break the gauge symmetry and thus provide an alternative to the Higgs mechanism in unified theories. We explore a simple example: instanton-induced quark pair (diquark) condensation in QCD with 2 flavors and N-c colors. We do find diquark condensates in the vacuum, but only for N-c = 2, where they are equivalent to the standard quark-antiquark condensate. At N-c greater than or equal to 3 diquark condensates exist as meta-stable saddle points of the instanton-induced effective QCD action and may strongly affect the properties of matter under extreme conditions. The scalar diquark excitation, which is a Goldstone boson at N-c = 2, becomes unbound for N-c greater than or equal to 3.

引用

页码：147 / 152

页数：6

共 21 条

[1] DIQUARKS [J].