Scattering states in the four nucleons system
  The Faddeev-Yakubowski equations have been solved in configuration space for the four nucleons system. Results for bound and scattering states in the isospin and S-wave approximation for different (T,S) channels are presented. The n-t elastic cross section has been also calculated with realistic interactions. A special interest was devoted to the description of the observed resonant structure at $T_{lab}\approx 3$ MeV which is well reproduced only by the simple MT I-III potential. 
F. Ciesielski, J. Carbonell and C.Gignoux