A possible hadronic excess in psi(2S) decay and rho-pi puzzle

Abstract

We examine the so-called rho-pi puzzle of the psi(2S) decay by incorporating two inputs: One is the relative phase between the one-photon and the gluon decay amplitude, and the other is a possible anomaly in the inclusive nonelectromagnetic decay rate of psi(2S). We propose the possibility that in the psi(2S) decay a hadronic decay process of long distance origin is important in addition to the short-distance decay process. The amplitude of this additional process should nearly cancel the three-gluon amplitude in the exclusive psi(2S)---> 1-0- and turn the sum dominantly real in contrast to the J/psi decay. We present general consequences of this mechanism and then briefly look into two models which possibly explain the course of this additional amplitude.

14 pages, 2 Tables, and 3 eps figures. Replaces the original version with a minor change in the title and inclusion of more references. The version to appear in Phys. Rev. D

References in corpus (4)

• Phases and Amplitudes in Inclusive $\Psi$ and ${\Psi }^{\prime }$ Decays
• A large final-state interaction in the 0-0- decays of J/psi
• Charmonium Decays to Axialvector plus Pseudoscalar Mesons
• The $\rho -\pi$ Puzzle of J/ψand ψ' Decays

Cited by in corpus (43)

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• Open charm effects in the explanation of the long-standing "$\rho \pi$ puzzle"
• Study of electromagnetic decay of $J/\psi$ and ${\psi }^{\prime }$ to vector and pseudoscalar
• Observation of Thirteen New Exclusive Multi-Body Hadronic Decays of the $\psi (2S)$
• First observation of psi(2S)-->K_S K_L
• Measuring psi(3770) --> rho pi in e+e- experiment
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• Improved measurement of the branching ratio of J/psi-->K_S K_L
• Determination of the relative phase in ψ' and J/ψ decays into baryon and antibaryon
• Possible large phase in psi(2S) -> 1-0- Decays
• Exclusive Double Charmonium Production from ${\rm Y}$ Decay
• Observation of the decay $\psip\rar\kstark$
• The interference between virtual photon and 1-- charmonium in e+e-experiment
• Relative phase between strong and electromagnetic amplitudes in psi(2S) to 0- 0- decays
• Measurements of $\psi (2S)$ decays into $\varphi {\pi }^0$, $\varphi \eta$, $\varphi {\eta }^{{}^{\prime }}$, $\omega \eta$, and $\omega {\eta }^{{}^{\prime }}$
• Possible large branching fraction of psi(3770) decays to charmless final states
• Precision measurement of the branching fractions of J/psi -> pi+pi-pi0 and psi' -> pi+pi-pi0
• Psi(2S) two- and three-body hadronic decays
• Updated study of the ${\eta }_c$ and ${\eta }_c^{\prime }$ decays into light vector mesons
• Charm Physics - A Field Full with Challenges and Opportunities
• The Form Factors of omega pi0 and pi+ pi- at psi(2S)
• Measurement of Interference between Electromagnetic and Strong Amplitudes in psi(2S) Decays to Two Pseudoscalar Mesons
• Study of psi(2S) decays to X J/psi
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• Measurement of the phase between strong and electromagnetic amplitudes of $J/\psi$ decays
• Measuring psi(3770) -> Kshort Klong as a test of the S- and D-wave mixing of charmonia
• Phase Difference Between the Electromagnetic and Strong Amplitudes for psi(2S) and J/psi Decays into Pairs of Pseudoscalar Mesons
• Effective-Lagrangian study of ${\psi }^{\prime }(J/\psi )\to VP$ and the insights into $\rho \pi$ puzzle
• Survival before annihilation in Psi-prime decays
• Comprehensive Calculations on the OZI-forbidden Nonleptonic Decays of Orthoquarkonia $J/\psi ({\rm Y})\to \pi \pi ,\rho \pi$
• Hybrid Charmonium and the $\rho -\pi$ Puzzle
• Study of $\psi (3770)$ decaying to Baryon anti-Baryon Pairs
• Symmetry analysis of charmonium two-body decay
• Relativistic corrections to $\psi (nS)\to \rho \pi$ exclusive decays and their role in the understanding of the $\rho \pi$-puzzle
• Data taking strategy for the phase study in ${\psi }^{\prime }\to K^{+}{K}^{-}$
• Fast computation of observed cross section for ${\psi }^{\prime }\to PP$ decays
• Analytical formula for the cross section of hadron production from $e^{+}{e}^{-}$ collisions around the narrow charmouinum resonances