Title: The pion-nucleon coupling constant in QCD sum rules
Abstract: The pion-nucleon coupling constant gπn is studied on the basis of the QCD sum rules. Both the Borel sum rules and the finite energy sum rules for gπn are used to examine the effect of higher dimensional operators (up to dimension 7) and αs, corrections in the operator product expansion. Agreement with the experimental number is reached only when Sπ/Sn is greater than one, where Sπ (Sn) is the continuum threshold for the gπn (nucleon) sum rule.