Chiral Meson Lagrangians from the QCD Based NJL Model Modified by Nonlocal Effects
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
Starting from a QCD inspired bilocal quark interaction we obtain a local effective meson lagrangian. In contrast to previous local (NJL-like) approaches, we include nonlocal corrections related to the finite meson size which we characterize by a small parameter. After bosonization using the heat-kernel method we predict the structure coefficients of the Gasser-Leutwyler -lagrangian up to first order in this parameter. The modifications for the coefficients are typically of the order 10-20\%, except for , where we find a stronger nonlocal influence.
Cite
@article{arxiv.hep-ph/9404309,
title = {Chiral Meson Lagrangians from the QCD Based NJL Model Modified by Nonlocal Effects},
author = {A. A. Bel'kov and A. V. Lanyov and A. Schaale and S. Scherer},
journal= {arXiv preprint arXiv:hep-ph/9404309},
year = {2007}
}