Parton distribution functions from large N-c QCD

In the Bjorken limit, the tranverse momenta of partons can be treated pertu rbatively. The non-perturbative part of the problem of determining Deep Ine lastic structure functions becomes then that of solving two dimensional QCD (2DQCD). We show an isomorphism of 2DQCD with a bilocal field theory of ha drons ( two dimensional Quantum HadronDynamics, 2DQHD). Baryons are topolog ical solitons of this theory. The classical limit of 2DQHD is the large N-c limit of 2DQCD; by solving its equations of motion we can determine the st ructure function of the baryon. We compare the answer with measurements in neutrino scattering and get good agreement; also we find that the anti-quar k content of the baryon is small in the limit of large N-c and small curren t quark mass.