arXiv:nucl-th/9908035·v1·Nuclear Theory
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 a_{\eta N}. The position of the resonance moves towards the eta-d threshold when Re a_{\eta N} is increased, and turns into a quasi-bound state at Re a_{\eta N}=0.733 fm.
Comments: 13 pages, LaTeX (revtex.sty), 5 figures (epsfig), submitted to Phys.Rev.Lett