Couplings of the eta and eta' Mesons to the Nucleon
arXiv:hep-ph/0512048 · doi:10.1016/j.physletb.2006.12.048
Abstract
The couplings of the eta and eta' mesons to the nucleon are obtained from the U_A(1) Goldberger-Treiman relation. The chiral symmetry breaking corrections are very large and bring the calculated values of the coupling constants G_etaNN and G_eta'NN close to values obtained from potential models.
Version 3. The old version went by mistake Version to appear in Phys. Lett. B