Coarse graining Nuclear Interactions
  We consider a coarse graining of NN interactions in coordinate space very much in the spirit of the well known Vlowk approach. To this end we sample the interaction at about the minimal de Broglie wavelength probed by NN scattering below pion production threshold. This amounts to provide a simple delta-shell potential plus the standard OPE potential above 2 fm. The possible simplifications in the Nuclear many body problem are discussed. 
R. Navarro Perez, J.E. Amaro, E. Ruiz Arriola
nucl-th hep-ph