Abstract
We report on our recent study of in-medium ηN interactions and η -nuclear quasi-bound states. The ηN scattering amplitudes considered in the calculations are constructed within coupled-channel models that incorporate the S 11 N * (1535) resonance. The implications of self-consistent treatment and the role played by subthreshold dynamics are discussed.
Highlights
1 Introduction The ηN attraction generated by the N∗(1535) resonance near threshold seems to be strong enough to allow binding of the η meson in nuclei
In-medium modifications and strong energy dependence of the ηN scattering amplitudes have to be carefully taken into account
The in-medium amplitudes which serve as an input in our many-body self-consistent calculations are obtained from the free-space amplitudes GW and M2 by applying the multiple scattering approach [8]
Summary
The ηN attraction generated by the N∗(1535) resonance near threshold seems to be strong enough to allow binding of the η meson in nuclei. In-medium modifications and strong energy dependence of the ηN scattering amplitudes have to be carefully taken into account. This contribution briefly summarizes systematic treatment of energy dependence within self-consistent calculations of η quasi-bound states in selected nuclei (see [1,2,3] for more details).
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