Eta-mesic nuclei in relativistic mean-field theory

Details Eta-mesic nuclei in relativistic mean-field theory Eta-mesic nuclei in relativistic mean-field theory

2008-02-26

arxiv.org/abs/0802.3738v2

Europhys.Lett.81:42002,2008

Physics

Nuclear Physics

Nuclear Theory

6 pages

Scientific paper

10.1209/0295-5075/81/42002

With the eta-nucleon (eta N) interaction Lagrangian deduced from chiral perturbation theory, we study the possible eta-mesic nuclei in the framework of relativistic mean-field theory. The eta single-particle energies are sensitive to the eta N scattering length, and increase monotonically with the nucleon number A. If the scattering length is in the range of a^{eta N}=0.75-1.05 fm and the imaginary potential V_{0}-15 MeV, some discrete states of C, O and Ne eta bound states should be identified in experiments. However, when the scattering length a^{eta N}< 0.5 fm, or the imaginary potential V_{0} > 30 MeV, no discrete eta meson bound states could be observed in experiments.

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