Short Range Quark-Quark Interactions and Nucleon Structure Function at High Bjorken x*

We investigate the role of the quark-quark interaction at shortdistances in the generation of the strength of nucleon structure function at high Bjorken x. This work represents the continuation of our previous study, in which we developed a residual mean field model of nucleon structure function. The parameters of the mean-field model obtained in description of the valence PDFs at 0.1 < x< 0.5 is used to describe the non- perturbative part of the structure function while hard gluon exchanges are introduced to calculate the strength of the high x part of the same structure function at x>0.5. In the calculation we considered both two- and three-quark short range interactions through hard gluon exchange which arecalculated within perturbative QCD.