Couplings of NN(nπ) n \geq 1

Abstract

Determinations of the couplings of $NN(n\pi )(n\ge 1)$ are reported. The study is based on both a quark model of nucleon and a chiral field theory of mesons. The coupling of $NN\pi$ is predicted and is in agreement with current value. It shows that the coupling $NN2\pi$ is resulted in the nature that pion is a Goldstone boson. The couplings of $NN(n\pi )(n\ge 2)$ are predicted by this approach.

15 pages