Hadronic coupling constants in lattice QCD

We calculate the hadronic coupling constantsgNNπ andgϱππ in QCD, including dynamical quarks in the framework of staggered fermions in the lattice approach. For the nucleon-pion coupling we obtaingNNπ=13.8±5.8, to be compared with the experimental value 13.13±0.07 [1]. The ϱππ coupling has been analysed for two different sets of operators with the averaged resultgϱππ=4.2±1.9 which is to be compared with the experimental value 6.06±0.01 [2].