Intrinsic Charm of Vector Mesons: A Possible Solution of the “ρπPuzzle''

Abstract

An outstanding mystery of charmonium physics is why the $J/\ensuremath{\psi}$ decays prominently to pseudoscalar plus vector meson channels, such as $J/\ensuremath{\psi}\ensuremath{\rightarrow}\ensuremath{\rho}\ensuremath{\pi}$ and $J/\ensuremath{\psi}\ensuremath{\rightarrow}{K}^{*}K$, whereas the ${\ensuremath{\psi}}^{\ensuremath{'}}(2S)$ does not. We show that such decays of $J/\ensuremath{\psi}$ and their suppression for ${\ensuremath{\psi}}^{\ensuremath{'}}(2S)$ follow naturally from the existence of intrinsic charm $|\overline{q}q\overline{c}c〉$ Fock components of the light vector mesons.