Low-energy eta-d resonance
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 aη N. The position of the resonance moves towards the eta-d threshold when Re aη N is increased, and turns into a quasi-bound state at Re aη N=0.733 fm.
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