Title of article
QCD with large number of quarks: effects of the instanton – anti-instanton pairs
Author/Authors
M. Velkovsky، نويسنده , , E. Shuryak، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 1998
Pages
5
From page
398
To page
402
Abstract
We calculate the contribution of instanton – anti-instanton (IĪ) pairs to the vacuum energy of QCD-like theories with Nf light fermions, using the saddle point method. A qualitative change of behavior is found around Nf=6. We discuss the relation of this phenomenon to the mechanism of chiral symmetry breaking and the asymptotic of the perturbative series associated with IĪ contributions.
Journal title
PHYSICS LETTERS B
Serial Year
1998
Journal title
PHYSICS LETTERS B
Record number
910400
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