Intrinsic Charm of Vector Mesons: A Possible Solution of the 'rho pi' Puzzle

摘要

An outstanding mystery of charmonium physics is why the J/\psi decaysprominently to pseudoscalar plus vector meson channels, such as J/\psi -> \rho\pi and J/\psi -> K^*K, whereas the \psi'(2S) does not. We show that suchdecays of J/\psi and their suppression for \psi'(2S) follow naturally from theexistence of intrinsic charm |qbar q cbar c> Fock components of the lightvector mesons.