Lee-Yang–inspired functional with a density-dependent neutron-neutron scattering length

  title={Lee-Yang–inspired functional with a density-dependent neutron-neutron scattering length},
  author={M. Grasso and Denis Lacroix and C. J. Yang},
  journal={Physical Review C},
Inspired by the low--density Lee-Yang expansion for the energy of a dilute Fermi gas of density $\rho$ and momentum $k_F$, we introduce here a Skyrme--type functional that contains only $s$-wave terms and provides, at the mean--field level, (i) a satisfactory equation of state for neutron matter from extremely low densities up to densities close to the equilibrium point, and (ii) a good--quality equation of state for symmetric matter at density scales around the saturation point. This is… 
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