2006/10/31 by Qiang Zhao, Q. Zhao, Gang Li +1 · 1 citation
Engineering · Mathematics · Physics and Astronomy · #Electromagnetic Scattering and Analysis #Electromagnetic Simulation and Numerical Methods #Spectral Theory in Mathematical Physics #hep-ex #hep-ph
paper · pdf · doi:10.1016/j.physletb.2006.12.037
published as Phys.Lett.B645:173-179,2007 · Revtex, 10 pages, 1 eps figure; further discussions about the helicity conservation rule and exp. constraints are included; version to appear in Phys. Lett. B
arxiv created 2006/12/18 · openalex publication_date 2006/12/22 · arxiv updated 2009/12/01 · openalex created_date 2021/04/13 · openalex updated_date 2026/07/28
The electromagnetic decay contributions to J/ψ(ψ^′)→ VP, where V and P stand for vector and pseudoscalar meson, respectively, are investigated in a vector meson dominance (VMD) model. We show that J/ψ(ψ^′)→ γ^*→ VP can be constrained well with the available experimental information. We find that this process has significant contributions in ψ^′→ VP and may play a key role in understanding the deviations from the so-called "12% rule" for the branching ratio fractions between ψ^′→ VP and J/ψ→ VP. We also address that the "12% rule" becomes very empirical in exclusive hadronic decay channels.