Level crossing of particle–hole and mesonic modes in eta-mesonic nuclei

2008/01/31 by Daisuke Jido, D. Jido, E. E. Kolomeitsev +4
Physics and Astronomy · #Nuclear physics research studies #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th

paper · pdf · doi:10.1016/j.nuclphysa.2008.07.012

published as Nucl.Phys.A811:158-178,2008 · 22 pages, 12 figures

arxiv created 2008/01/31 · openalex publication_date 2008/07/24 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/01

Abstract

We study eta meson properties in the infinite nuclear matter and in atomic nuclei with an emphasis on effects of the eta coupling to N*(1535)--nucleon-hole modes. The N*(1535) resonance, which dominates the low-energy eta-nucleon scattering, can be seen as a chiral partner of the nucleon. The change of the chiral mass gap between the N* and the nucleon in a nuclear medium has an impact on the properties of the eta-nucleus system. If the N*-nucleon mass gap decreases with a density increase (chiral symmetry restoration) the calculations show the existence of the resonance state at the energy about 60 MeV and two bound eta-nucleus states with the binding energies about -80 MeV. These states can have strong effect on predicted cross sections of the ¹2C (gamma,p) ¹1B reaction with eta-meson production.

Citations

• Search for and study of eta-mesic nuclei in pA-collisions at the JINR LHE nuclotron
• Are η- and ω-nuclear states bound ?
• Possibility to study eta-mesic nuclei and photoproduction of slow eta-mesons at the GRAAL facility
• Pseudoscalar neutral mesons in hot and dense matter
• In-medium nuclear interactions of low-energy hadrons
• Chiral symmetry for positive and negative parity nucleons
• Chiral Symmetry of Baryons
• Negative-parity nucleon resonance in the QCD sum rule
• η- andη'-mesic nuclei andUA(1)anomaly at finite density