Nucleon quasi-parton distributions in the large N_c limit

In this talk, we present the nucleon quasi-parton distribution functions in the chiral quark soliton model. The derivation of a set of sum-rules depending on the velocity of the nucleon and on the Dirac matrix defining the distribution functions is demonstrated. We present numerical results for the isosinglet unpolarized distribution, in which we find that the anti-quark distribution breaks the positivity condition at nucleon velocities of v≈0.99(PN≈7.0MN) and smaller. For the isosinglet unpolarized case, we show that a large nucleon momentum is required for the quasi-parton distribution to get close enough to the usual parton distribution function.