Calculations of eta-nuclear quasi-bound states in few-body systems

0506045 - ÚJF 2020 RIV FR eng C - Konferenční příspěvek (zahraniční konf.)
Schäfer, Martin - Barnea, N. - Friedman, E. - Gal, A. - Mareš, Jiří
Calculations of eta-nuclear quasi-bound states in few-body systems.
EPJ Web of Conferences. Vol. 199. Les Ulis: E D P Sciences, 2019, č. článku 02022. ISSN 2100-014X.
[15th International Workshop on Meson Physics (MESON 2018). Krakow (PL), 07.06.2018-12.06.2018]
Institucionální podpora: RVO:61389005
Klíčová slova: SVM calculations * nuclei * eta-nuclear
Obor OECD: Atomic, molecular and chemical physics (physics of atoms and molecules including collision, interaction with radiation, magnetic resonances, Mössbauer effect)

We report on our Stochastic Variational Method (SVM) calculations of eta-nuclear quasi-bound states in s-shell nuclei as well as the very recent calculation of the p-shell nucleus Li-6. The eta N potentials used were constructed from eta N scattering amplitudes obtained within coupled-channel models that incorporate N*(1535) resonance. We found that eta Li-6 is bound in the eta N interaction models that yield Rea(eta N) >= 0.67 fm. Additional repulsion caused by the imaginary part of eta N potentials shifts the onset of eta-nuclear binding to eta He-4, yielding very likely no quasi-bound state in eta He-3.
Trvalý link: http://hdl.handle.net/11104/0297338