Novel analysis of the decays psi' -> h_c pi^0 and eta_c'-> chi_{c0} pi^0

Abstract

We show that in the transitions psi' -> h_c π^0 and eta_c' -> chi_{c0} pi^0 the contributions from charmed meson loops are highly suppressed, in contrast to various other charmonium decays. We calculate the width of the psi' -> h_c pi^0, which agrees with the recent BES-III data, and predict the width of the eta_c' -> chi_{c0} pi^0, Γ(eta_c' -> chi_{c0} pi^0) = 1.5\pm0.4 keV. A confirmation of this prediction would also provide additional support for a recent analysis of psi' -> J/psi pi^0 (eta), where loops are claimed to play a prominent role.

7 pages, 1 figure. Version accepted for publication in Phys. Rev. D

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• More hidden heavy quarkonium molecules and their discovery decay modes
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• Hadron physics potential of future high-luminosity B-factories at the Upsilon(5S) and above
• Extracting the light quark mass ratio m_u/m_d from bottomonia transitions
• Hunting for the $X_b$ via hidden bottomonium decays
• Detecting the polarization in ${\chi }_{cJ}\to \varphi \varphi$ decays to probe hadronic loop effect
• Study on the radiative decays of $h_c$ via intermediate meson loops model
• Searches for isospin-violating transitions ${\chi }_{c0,2}\to {\pi }^0{\eta }_c$