Total cross section of neutron-proton scattering at low energies in   quark-gluon model
  We show that analysis of nonrelativistic neutron-proton scattering in a framework of relativistic QCD based quark model can give important information about QCD vacuum structure. In this model we describe total cross section of neutron-proton scattering at kinetic energies of projectile neutron from 1 eV up to 1 MeV. 
V. A. Abramovsky, N. V. Radchenko
hep-ph