Self-consistent Gaussian model of nonperturbative QCD vacuum

Details Self-consistent Gaussian model of nonperturbative QCD vacuum Self-consistent Gaussian model of nonperturbative QCD vacuum

2006-08-26

arxiv.org/abs/hep-ph/0608288v2

ActaPhys.Polon.B37:3627-3634,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 7 figures, english version

Scientific paper

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.

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