Phenomenological Evidence for the Gluon Content of $η$ and $η'$

Details Phenomenological Evidence for the Gluon Content of $η$ and $η'$ Phenomenological Evidence for the Gluon Content of $η$ and $η'$

1995-08-23

arxiv.org/abs/hep-ph/9508359v1

Phys.Lett. B365 (1996) 367-376

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, Latex2e, 4 figures (uuencoded and gzipped)

Scientific paper

10.1016/0370-2693(95)01287-7

We discuss the effect of $\eta$--$\eta'$ mixing and of axial current anomalies on various decay processes. We describe the 2$\gamma$ decays of $\eta$ and $\eta'$, the radiative decays of low-lying vector mesons as well as the decays $\eta\to 3\pi$, $J/\psi\to\eta\gamma$ and $J/\psi\to\eta'\gamma$ in one unified framework, in which they are related to the electromagnetic and strong axial current anomalies, respectively. We also discuss briefly the enhancement of $\eta'$ in $D_s$ decays and suggest a possible relation to gluon-mediated processes. The importance of the decays of the glueball candidates $f_0(1500)$ and $ f_0(1590)$ into $\eta \eta'$ channels is also stressed.

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