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arXiv · hep-ph/0608288

Self-consistent Gaussian model of nonperturbative QCD vacuum

A. P. Bakulev·A. V. Pimikov
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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.

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A. P. Bakulev, A. V. Pimikov. 2006-10-05. Self-consistent Gaussian model of nonperturbative QCD vacuum. https://arxiv.org/abs/hep-ph/0608288

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