English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

We show that the newly measured branching ratios of vector charmonia($J/\psi$, $\psi^\prime$ and $\psi(3770))$ into $\gamma P$, where $P$ standsfor light pseudoscalar mesons $\pi^0$, $\eta$, and $\eta^\prime$, can be wellunderstood in the framework of vector meson dominance (VMD) in association withthe $\eta_c$-$\eta(\eta^\prime)$ mixings due to the axial gluonic anomaly.These two mechanisms behave differently in $J/\psi$ and $\psi^\prime\to \gammaP$. A coherent understanding of the branching ratio patterns observed in$J/\psi(\psi^\prime)\to \gamma P$ can be achieved by self-consistentlyincluding those transition mechanisms at hadronic level. The branching ratiosfor $\psi(3770)\to\gamma P$ are predicted to be rather small.

Understanding the radiative decays of vector charmonia to light pseudoscalar mesons