TY - JOUR
T1 - Few-body calculations of η-nuclear quasibound states
AU - Barnea, N.
AU - Friedman, E.
AU - Gal, A.
N1 - Publisher Copyright:
© 2015 The Authors.
PY - 2015/7/1
Y1 - 2015/7/1
N2 - 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.
AB - 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.
KW - Few-body systems
KW - Forces in hadronic systems and effective interactions
KW - Mesic nuclei
UR - http://www.scopus.com/inward/record.url?scp=84931275559&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2015.06.010
DO - 10.1016/j.physletb.2015.06.010
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AN - SCOPUS:84931275559
SN - 0370-2693
VL - 747
SP - 345
EP - 350
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -