Parton model from bi-local solitonic picture of the baryon in two-dimensions

We study a previously introduced bi-local gauge invariant reformulation of two-dimensional QCD, called 2d hadron dynamics. The baryon arises as a topo logical soliton in hadron dynamics. We derive an interacting parton model f rom the soliton model, thus reconciling these two seemingly different point s of view. The valence quark model is obtained as a variational approximati on to hadron dynamics. A succession of better approximations to the soliton picture are obtained. The next simplest case corresponds to a system of in teracting valence,'sea' and anti-quarks. We also obtain this 'embellished' parton model directly from the valence quark system through a unitary trans formation. Using the solitonic point of view, we estimate the quark and ant i-quark distributions of 2d QCD. Possible applications to deep inelastic st ructure functions are pointed out. (C) 2000 Elsevier Science B.V. All right s reserved.