Implications of light-quark admixtures on charmonium decays into meson pairs

Details Implications of light-quark admixtures on charmonium decays into meson pairs Implications of light-quark admixtures on charmonium decays into meson pairs

2000-03-10

arxiv.org/abs/hep-ph/0003096v2

Phys.Rev.D62:074006,2000

Physics

High Energy Physics

High Energy Physics - Phenomenology

21 pages, 3 figures (using epsfig.sty, a4wide.sty); v2 contains minor changes (1 paragraph in Sec.II and a few references adde

Scientific paper

10.1103/PhysRevD.62.074006

We argue that charmonium decays into meson pairs fall into two distinct classes: one that is under control of perturbative QCD and another one that is governed by a soft mechanism. We concentrate on a systematic analysis of J/Psi (Psi') decays into a light pseudoscalar and a light vector meson and eta(c) decays into a pair of light vector mesons. These processes belong to the second class and are characterized by non-conserved hadronic helicity. It is assumed that, in these cases, the charmonium state decays dominantly through a light-quark Fock component by a soft mechanism which is characteristic of OZI-rule allowed strong decays. Estimating the light-quark admixture by meson mixing, we obtain a reasonable description of the branching ratios for these processes.

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