An interacting parton model for quark and anti-quark distributions in the baryon

In this paper we study a 1+1 dimensional relativistic parton model for the structure of baryons. The quarks and and-quarks interact through a linear p otential. We obtain an analytic formula for the isospin averaged valence qu ark distribution in the chiral and large N-c limits. The leading 1/N-c and non-zero current quark mass corrections are estimated. Then we extend this model to include 'sea' and anti-quarks. We find that the anti-quark content is small at a low value of Q(2). Using these distributions as initial cond itions for Q(2) evolution, we compare with experimental measurements of the structure function xF(3)(x,Q(2)) and find reasonable agreement. The only p arameters we can adjust are the fraction of baryon momentum carried by vale nce quarks and the initial scale Q(0)(2). (C) 2000 Published by Elsevier Sc ience B.V.