TY - JOUR
T1 - η-nuclear bound states revisited
AU - Friedman, E.
AU - Gal, A.
AU - Mareš, J.
PY - 2013/10/1
Y1 - 2013/10/1
N2 - 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.
AB - 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.
KW - Mesic nuclei
KW - Meson-baryon interactions
KW - Mesons in nuclear matter
UR - http://www.scopus.com/inward/record.url?scp=84883053461&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2013.07.035
DO - 10.1016/j.physletb.2013.07.035
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AN - SCOPUS:84883053461
SN - 0370-2693
VL - 725
SP - 334
EP - 338
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
IS - 4-5
ER -