Dissociation of theJ/ψby light mesons, and chiral symmetry

Abstract

The implication of chiral symmetry for the pion-induced dissociation of the $J/\ensuremath{\psi}$ is examined in detail. It is shown how the low-energy dynamics of pions, constrained by chiral symmetry, affect the dissociation cross section. The derived soft-pion theorem is then integrated into a Lagrangian model that includes also abnormal parity content and chiral-symmetric form factors. Dissociation by the \ensuremath{\rho} meson is also considered.