Two-pion decays of mesons and confinement singularities

A. V. Anisovich, V. V. Anisovich, M. A. Matveev +3

We consider the two-pion decay of the $\rho$-meson, the ${}^3{S}_{1}q\bar{q}$-state of the constituent quarks -- the decay being determined by the transition $q\bar{q}\to \pi \pi$ contains informa…