QCD with large number of quarks: effects of the instanton-anti-instanton pairs

被引：49

作者：

Velkovsky, M ^{[1
]}

Shuryak, E ^{[1
]}

机构：

[1] SUNY Stony Brook, Dept Phys, Stony Brook, NY 11794 USA

来源：

PHYSICS LETTERS B | 1998年 / 437卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(98)00930-7

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the contribution of instanton - anti-instanton (I (I) over bar) pairs to the vacuum energy of QCD-like theories with N-f light fermions, using the saddle point method. A qualitative change of behavior is found around N-f = 6. We discuss the relation of this phenomenon to the mechanism of chiral symmetry breaking and the asymptotic of the perturbative series associated with I (I) over bar contributions. (C) 1998 Published by Elsevier Science B.V. All rights reserved.

引用

页码：398 / 402

页数：5

共 36 条

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