Eta-Nucleon Coupling Constant with SU(3) Breaking Contributions in QCD Sum Rules

We study the $\eta$NN coupling constant using the method of QCD Sum Rules starting from the vacuum-to-eta correlation function of the interpolating fields of two nucleons. The matrix element of this correlation has been taken with respect to nucleon spinors to avoid unwanted excited states. The SU(3) breaking effects have been accounted in the form of ?-mass, s-quark mass and eta decay constant. The results obtained have been compared with phenomenologically determined values of the coupling constant from literature.