Self-consistent Gaussian model of nonperturbative QCD vacuum
High Energy Physics - Phenomenology
2008-11-26 v2
Abstract
We show that the minimal Gaussian model of nonlocal vacuum quark and quark-gluon condensates in QCD generates the non-transversity of vector current correlators. We suggest the improved Gaussian model of the nonperturbative QCD vacuum, which respects QCD equations of motion and minimizes the revealed gauge-invariance breakdown. We obtain the refined values of pion distribution amplitude (DA) conformal moments using the improved QCD vacuum model and construct the allowed region for Gegenbauer coefficients a_2 and a_4 of the pion DA.
Keywords
Cite
@article{arxiv.hep-ph/0608288,
title = {Self-consistent Gaussian model of nonperturbative QCD vacuum},
author = {A. P. Bakulev and A. V. Pimikov},
journal= {arXiv preprint arXiv:hep-ph/0608288},
year = {2008}
}
Comments
15 pages, 7 figures, english version