Low energy n+t scattering and the NN forces

Details Low energy n+t scattering and the NN forces Low energy n+t scattering and the NN forces

1999-03-26

arxiv.org/abs/nucl-th/9903062v1

Phys.Lett. B447 (1999) 199-218

Physics

Nuclear Physics

Nuclear Theory

14 pages, 5 figures .eps latex.tar.gz file

Scientific paper

10.1016/S0370-2693(98)01501-9

The Faddeev-Yakubovsky equations have been solved in configuration space for the four nucleon system. The n+t elastic cross section has been calculated using several realistic interactions and a phenomenological three-nucleon force. Special attention is devoted to the description of the observed resonant structure at $T_{lab}\approx 4$ MeV. In the present state of the calculations, the realistic NN interactions are unable to describe the energy region considered, i.e. n+t S- and P- waves. Whereas the inclusion of a three-nucleon force improves the zero energy region, the disagreement in the resonant peak remains. This failure contrasts with the results of a pure phenomenological model. The origin of this disagreement as well as the possible issues are discussed.

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