arXiv:hep-ph/0212060·v2·High Energy Physics — Phenomenology
The Form Factors of omega pi0 and pi+ pi- at psi(2S)
P. Wang🇨🇳 · X. H. Mo🇨🇳 · C. Z. Yuan🇨🇳
Abstract
The measurements of psi(2S) -> omega pi0 and psi(2S) -> pi+ pi- in e+e- experiments are examined. It is found that the non-resonance virtual photon annihilation gives large contributions to the observed cross sections of these two processes. By including this contribution, the form factors and branching fractions of these two decay modes are revised.
Comments: 6 pages, 1 figures(two diagrams), Phys. Lett. B557 (2003) 192-197