Few-body calculations of η-nuclear quasibound states

N. Barnea, E. Friedman, A. Gal*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

We report on precise hyperspherical-basis calculations of ηNN and ηNNN quasibound states, using energy dependent ηN interaction potentials derived from coupled-channel models of the S11 N*(1535) nucleon resonance. The ηN attraction generated in these models is too weak to generate a two-body bound state. No ηNN bound-state solution was found in our calculations in models where ReaηN≲1 fm, with aηN the ηN scattering length, covering thereby the majority of N*(1535) resonance models. A near-threshold ηNNN bound-state solution, with η separation energy of less than 1 MeV and width of about 15 MeV, was obtained in the 2005 Green-Wycech model where ReaηN≈1fm. The role of handling self consistently the subthreshold ηN interaction is carefully studied.

Original languageAmerican English
Pages (from-to)345-350
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume747
DOIs
StatePublished - 1 Jul 2015

Bibliographical note

Publisher Copyright:
© 2015 The Authors.

Keywords

  • Few-body systems
  • Forces in hadronic systems and effective interactions
  • Mesic nuclei

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