η-nuclear bound states revisited

E. Friedman, A. Gal*, J. Mareš

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

62 Scopus citations

Abstract

The strong energy dependence of the s-wave ηN scattering amplitude at and below threshold, as evident in coupled-channels K-matrix fits and chiral models that incorporate the S11 N*(1535) resonance, is included self-consistently in η-nuclear bound-state calculations. This approach, applied recently in calculations of kaonic atoms and K--nuclear bound states, is found to impose stronger constraints than ever on the onset of η-nuclear binding, with a minimum value of ReaηN≈0.9 fm required to accommodate an η-He4 bound state. Binding energies and widths of η-nuclear states are calculated within several underlying ηN models for nuclei across the periodic table, including Mgη25 for which some evidence was proposed in a recent COSY experiment.

Original languageEnglish
Pages (from-to)334-338
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume725
Issue number4-5
DOIs
StatePublished - 1 Oct 2013

Keywords

  • Mesic nuclei
  • Meson-baryon interactions
  • Mesons in nuclear matter

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