Gogny forces

Actual nuclear forces are of a finite range. These are, for example, Gogny forces [40] representing more realistic approximation of actual nuclear forces than Skyrme approximation. Gogny interaction has no any velocity dependence and fulfills the Galilean invariance. Instead, two-body Skyrme interaction depends on relative velocities k = j2i (Vi — V2), which just simulates the finite range effects [20]. 

The model, combined with the HFB-treatment of the density-dependent Gogny force and with the Coupled hannel tjgthod of Tamura, is employed for a-scattering from Mg and Si. (3)... 

B. Nerlo-Pomorska, K. Pomorski, J. F. Berger, J. Decharge, The neutron halo in heavy nuclei calculated with the Gogny force, Eur. Phys. J. A 8 (2000) 19-29. 

The crudeness of Skyrme forces has certain consequences. For example, the Skyrme functional has no any exchange-correlation term since the relevant effects are supposed to be already included into numerous Skyrme fitting parameters. Besides, the Skyrme functional may accept a diverse set of T-even and T-dd densities and currents. One may say that T-odd densities appear in the Skyrme functional partly because of its specific construction. Indeed, other effective nuclear forces (Gogny [40], Landau-Migdal [41]) do not exploit T-odd densities and currents for description of nuclear dynamics. 

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