Meson-loop contributions to the quark condensate from the instanton vacuum

We investigate the quark condensate of the QCD vacuum within the instanton vacuum model. We calculate the meson-loop contributions to the dynamical quark mass and quark condensate to O(1/Nc)-, O(m/Nc)-, and O((mlnm)/Nc)-order corrections. We find that the meson (especially pion) loops provide substa...

Full description

Saved in:
Bibliographic Details
Published in:Physics letters. B 2006-02, Vol.633 (6), p.701-709
Main Authors: Kim, Hyun-Chul, Musakhanov, M.M., Siddikov, M.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Instanton vacuum
Nuclear physics
Physics
Quark condensate
The physics of elementary particles and fields
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigate the quark condensate of the QCD vacuum within the instanton vacuum model. We calculate the meson-loop contributions to the dynamical quark mass and quark condensate to O(1/Nc)-, O(m/Nc)-, and O((mlnm)/Nc)-order corrections. We find that the meson (especially pion) loops provide substantial contributions to the dynamical quark mass and as a result to the quark condensate. The results indicate that the 1/Nc corrections should be reconsidered in the systematical way. The present results are consistent with those from chiral perturbation theory.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2005.11.054