An Explanation for the rho-pi Puzzle of J/psi and psi' Decays

Abstract

We propose a new explanation for the longstanding puzzle of the tiny branching fraction of psi' -> rho pi relative to that for J/psi -> rho pi. In the case of J/psi, we argue that this decay is dominated by a higher Fock state in which the ccbar pair is in a color-octet ^3S_1 state and via annihilate process ccbar -> qqbar. In the case of the psi', we argue that the probability for the ccbar pair in this higher Fock state to be close enough to annihilate is suppressed by a dynamical effect related to the small energy gap between the mass of the psi' and the DDbar threshold.

9 pages, cut the paper, small change to the discussion about psi' suppresion mechanism

References in corpus (4)

• Intrinsic Charm of Vector Mesons: A Possible Solution of the "rho pi" Puzzle
• Mixing of eta-eta' Mesons in J/psi Decays into a Vector and a Pseudoscalar Meson
• Colour-octet contributions to exclusive charmonium decays
• Glueballs: Charmonium Decay and $\bar{p}p$ Annihilation

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• Precision measurement of the branching fractions of J/psi -> pi+pi-pi0 and psi' -> pi+pi-pi0
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