Non-perturbative corrections of quark forces in nucleon

The authors use the light front dynamics framework, in the light like gauge, their basic dynamical equation is the Weinbert equation for three valence quarks, written in terms of the relativistic Jacobi relative momenta. In this paper, the Shifman-Vainstein-Zakharov method of extending the QCD perturbative calculations from small distances to the larger one, by including the QCD non-perturbative parameters (the quark and gluon condensates) is applied to the forces acting between three valence quarks of nucleon