Possible large phase in psi(2S) -> 1-0- Decays

Abstract

The strong and the electromagnetic amplitudes are analyzed on the basis of the measurements of J/psi, psi(2S) -> 1-0- in e+e- experiments. The currently available experimental information is revised with inclusion of the contribution from e+e- -> gamma * -> 1-0- . The study shows that a large phase around minus 90 degree between the strong and the electromagnetic amplitudes could not be ruled out by the experimental data for psi(2S).

4 pages

References in corpus (2)

• The Form Factors of omega pi0 and pi+ pi- at psi(2S)
• Recent BES charmonium results

Cited by in corpus (18)

• Psi'' decays to charmless final states
• Observation of 1^-0^- Final States from psi(2S) Decays and e^+e^- Annihilation
• Study of electromagnetic decay of $J/\psi$ and ${\psi }^{\prime }$ to vector and pseudoscalar
• Measurement of the final states $\omega {\pi }^0$, $\rho \eta$, and $\rho {\eta }^{{}^{\prime }}$ from $\psip$ electromagnetic decays and $\ee$ annihilations
• Determination of the relative phase in ψ' and J/ψ decays into baryon and antibaryon
• Exclusive Double Charmonium Production from ${\rm Y}$ Decay
• Observation of the decay $\psip\rar\kstark$
• 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
• Observation of $\psi (3686)\to n\bar{n}$ and improved measurement of $\psi (3686)\to p\bar{p}$
• Measurement of the exclusive light hadron decays of the psi'' in e+e- experiments
• Exclusive decay of ${\rm Y}$ into $J/\psi +{\chi }_{c0,1,2}$
• Measuring psi(3770) -> Kshort Klong as a test of the S- and D-wave mixing of charmonia
• Study of $\psi (3770)$ decaying to Baryon anti-Baryon Pairs
• Symmetry analysis of charmonium two-body decay
• 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
• Hadronic decays of charmonia from BESII