arXiv:hep-ph/0303144·v2·High Energy Physics — Phenomenology
Possible large phase in psi(2S) -> 1-0- Decays
P.Wang🇨🇳 · C.Z.Yuan🇨🇳 · X.H.Mo🇨🇳
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).
Comments: 4 pages