Effects of baryon resonances on nucleon–nucleon interactions in a quark model

Nucleon–nucleon S-wave scattering is studied by using the resonating group method, which includes not only the nucleon and Δ but also their excited states. As quark–quark interactions, the one-gluon-exchange and one-pion-exchange potentials are employed with phenomenological confinement potential. Compared with the N and Δ, coupling effects induced by excited-state baryons are small.