Factorization model for distributions of quarks in hadrons

  title={Factorization model for distributions of quarks in hadrons},
  author={B. I. Ermolaev and Mario Greco and Serhiy Troyan},
  journal={The European Physical Journal C},
We consider distributions of unpolarized (polarized) quarks in unpolarized (polarized) hadrons. Our approach is based on QCD factorization. We begin with a study of the basic factorization for the parton–hadron scattering amplitudes in the forward kinematics and suggest a model for non-perturbative contributions to such amplitudes. This model is based on this simple observation: after emitting an active quark by the initial hadron, the remaining set of quarks and gluons becomes unstable, so a… 
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