Abstract

The reactions e(+)e(-)-->pi(+)pi(-) and e(+)e(-)-->(NN)-N-_ with N=p,n are studied in a nonperturbative quark model. The work suggests that the two-step process, in which the primary q(-)q pair first forms a vector meson which in turn decays into a hadron pair, is dominant over the one-step process in which the primary q(-)q pair is directly dressed by additional q(-)q pairs to form a hadron pair. To reproduce the experimental data of the reaction e(+)e(-)-->n(-)n and p(-)p, a D-wave, omega-like vector meson with a mass of around 2 GeV has to be introduced.