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arXiv · hep-ph/0205028

eta in the nuclear medium within a chiral unitary approach

T. Inoue·E. Oset
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Abstract

The self-energy of an eta meson in the nuclear medium is calculated in a chiral unitary approach. A coupled channel Bethe-Salpeter equation is solved to obtain the effective eta-N interaction in the medium. The base model reproduces well the free space pi-N elastic and inelastic scattering at the eta-N threshold or N^*(1535) region. The Pauli blocking on the nucleons, binding potentials for the baryons and self-energies of the mesons are incorporated, including the eta self-energy in a self-consistent way. Our calculation predicts about -54 -i29 MeV for the optical potential at normal nuclear matter for an eta at threshold but also shows a strong energy dependence of the potential.

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T. Inoue, E. Oset. 2002-05-02. eta in the nuclear medium within a chiral unitary approach. https://doi.org/10.1016/s0375-9474(02)01167-3

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