Goldberger-Treiman Relation and g_piNN from the Three Quark BS/Faddeev Approach in the NJL Model

Details Goldberger-Treiman Relation and g_piNN from the Three Quark BS/Faddeev Approach in the NJL Model Goldberger-Treiman Relation and g_piNN from the Three Quark BS/Faddeev Approach in the NJL Model

2000-04-27

arxiv.org/abs/nucl-th/0004063v1

Nucl.Phys. A689 (2001) 793-845

Physics

Nuclear Physics

Nuclear Theory

44 Pages, LaTeX2.09, 21 Figures in separate files

Scientific paper

10.1016/S0375-9474(00)00693-X

A systematic evaluation method of matrix elements of quantum one-body operators between nucleon states in the three-quark Bethe-Salpeter(3qBS)/Faddeev approach in the NJL model is reviewed. We do not confine ourselves to a particular truncation scheme of the 3qBS kernel. One of our main aims is to derive a general condition to be imposed on a given BS kernel in order that the PCAC relation is satisfied correctly. We apply this condition to some particular 3qBS kernels. We numerically calculate g_piNN in the 3qBS/Faddeev approach to estimate the violation of the Goldberger-Treiman/PCAC relation due to the UV-regularization scheme. We finally consider the non-vanishing current quark mass effects on the Goldberger-Treiman relation.

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