On the possibility of eta-mesic nucleus formation

Details On the possibility of eta-mesic nucleus formation On the possibility of eta-mesic nucleus formation

1997-07-28

arxiv.org/abs/nucl-th/9707044v1

Physics

Nuclear Physics

Nuclear Theory

10 pages, Revtex, only latex-figures, Talk given at European Conference on ADVANCES IN NUCLEAR PHYSICS AND RELATED AREAS, Th

Scientific paper

A microscopic treatment of eta-nucleus system is presented. Using this, the poles of the amplitude describing elastic scattering of eta-meson off the light nuclei ^2H, ^3H, ^3He, and ^4He have been located in the second quadrant of the complex plane of the eta-nucleus relative momentum. The results obtained indicate that, within the existing uncertainties in the eta-Nucleon input data, a bound state could exist. By a qualitative consideration it is shown that such bound-states, cannot be narrow. It is further shown that scattering length calculations cannot provide a definite answer on the question concerning the existence of eta-nucleus bound states.

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