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On the Coupling of the η Meson to the Nucleon
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⚛️ nucl-th
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mesoncouplingagreementamplitudesassociatedcalculatedconcludedconstants
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The pseudoscalar and pseudovector $\eta N$ coupling constants are calculated from an effective vertex associated with the $a_0(980)\pi N$ triangle diagram. The predicted values are in agreement with the ones concluded from fitting $\eta $ photoproduction amplitudes. In this context we stress the importance of the properties of the scalar meson octet for $\eta $ meson physics.
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