Low-energy eta-d resonance
N. V. Shevchenko, V. B. Belyaev, S. A. Rakityansky, S. A. Sofianos, W. Sandhas
Abstract
Elastic eta-d scattering is considered within the Alt-Grassberger-Sandhas (AGS) formalism for various eta-N input data. A three-body resonant state is found close to the eta-d threshold. This resonance is sustained for different choices of the two-body eta-N scattering length aηN. The position of the resonance moves towards the eta-d threshold when Re aηN is increased, and turns into a quasi-bound state at Re aηN=0.733 fm.
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