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

P. Wang·C. Z. Yuan·X. H. Mo
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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).

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P. Wang, C. Z. Yuan, X. H. Mo. 2004-03-24. Possible large phase in psi(2S) -> 1-0- Decays. https://doi.org/10.1103/physrevd.69.057502

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