Ultimate survival in anomalous psi(2S) decays

Abstract

The hierarchy among the radiative $\gamma$(${\pi }^0$, $\eta$, ${\eta }^{\prime }$) decay channels for the ${\psi }^{\prime }$ looks quite different from the $J/\psi$ one. The fate of charm, namely an ultimate survival of on-shell $c\bar{c}$ intermediate states, might give us the clue for this new puzzle in exclusive charmonium decays. A similar self-preservation has already been invoked in the past to solve the so-called $\rho \pi$ puzzle.

Comments: 6 pages, 3 figures, 1 table