Further study of the helicity selection rule evading mechanism in ${\eta }_c$, ${\chi }_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs

Abstract

We investigate the long distance contribution via charmed hadron loops in the processes ${\eta }_c$, ${\chi }_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs, which are supposed to be highly suppressed by the helicity selection rule as a consequence of the perturbative QCD framework. With an effective Lagrangian method, our estimation result indicates that such hadron loops play an important role in these hadronic decays. It is a further test of the evading mechanism for the helicity selection rule in charmonium baryon-antibaryon decays.

9 pages, 7 figures, to appear in J. Phys. G

References in corpus (5)

• Charmonium
• Towards a dynamical understanding of the non-$D\bar{D}$ decay of $\psi (3770)$
• The evasion of helicity selection rule in ${\chi }_{c1}\to VV$ and ${\chi }_{c2}\to VP$ via intermediate charmed meson loops
• K* photoproduction off the nucleon: gamma N --> K* Lambda
• Hadronic loop contributions to $J/\psi$ and ${\psi }^{\prime }$ radiative decays into $\gamma {\eta }_c$ or $\gamma {\eta }_c^{\prime }$

Cited by in corpus (14)

• More hidden heavy quarkonium molecules and their discovery decay modes
• Open charm effects in $e^{+}{e}^{-}\to J/\psi \eta$, $J/\psi {\pi }^0$ and $\varphi {\eta }_c$
• Measurements of Baryon Pair Decays of ${\chi }_{cJ}$ Mesons
• Measurements of the branching fractions of $\psi (3686)\to {\bar{\Sigma }}^0\Lambda +c.c.$ and ${\chi }_{cJ(J=0,1,2)}\to \Lambda \bar{\Lambda }$
• Detecting the polarization in ${\chi }_{cJ}\to \varphi \varphi$ decays to probe hadronic loop effect
• Study of the processes ${\chi }_{cJ}\to {\Xi }^{-}{\bar{\Xi }}^{+}$ and ${\Xi }^0{\bar{\Xi }}^0$
• First Measurements of ${\chi }_{cJ}\to {\Sigma }^{-}{\bar{\Sigma }}^{+}(J=0,1,2)$ Decays
• Study on the radiative decays of $h_c$ via intermediate meson loops model
• Evasion of HSR in the charmless decays of excited $P$-wave charmonia
• Combined study of the isospin-violating decay $D_s^{\ast }\to D_s{\pi }^0$ and radiative decay $D_s^{\ast }\to D_s\gamma$ with intermediate meson loops
• Observation of the decay $h_c\to 3({\pi }^{+}{\pi }^{-}){\pi }^0$
• Observation of ${\chi }_{cJ}\to 4K_S^0$
• Helicity amplitude and branching fraction measurement of ${\chi }_{cJ}\to \Lambda \bar{\Lambda }$
• Search for the isospin-violating decays ${\mathbf{\chi }}_{\mathbf{cJ}}\to \mathbf{\Lambda }{\bar{\mathbf{\Sigma }}}^0+\mathbf{c}.\mathbf{c}.$ and ${\mathbf{\eta }}_{\mathbf{c}}\to \mathbf{\Lambda }{\bar{\mathbf{\Sigma }}}^0+\mathbf{c}.\mathbf{c}.$