Threshold scattering of the eta-meson off light nuclei
S. A. Rakityansky, S. A. Sofianos, V. B. Belyaev, W. Sandhas
Abstract
The scattering lengths of eta-meson collisions with light nuclei d,t,3He, and 4He are calculated on the basis of few-body equations in coherent approximation. It is found that the eta-nucleus scattering length depends strongly on the number of nucleons and the potential-range parameter. By taking into account the off-shell behavior of the eta-N amplitude, the eta-4He scattering length increases considerably.
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