Further study of the helicity selection rule evading mechanism in $η_c$, $χ_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs

Details Further study of the helicity selection rule evading mechanism in $η_c$, $χ_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs Further study of the helicity selection rule evading mechanism in $η_c$, $χ_{c0}$ and $h_c$ decaying to baryon anti-baryon pairs

2010-04-04

arxiv.org/abs/1004.0496v2

J.Phys.G38:035007,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

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

Scientific paper

10.1088/0954-3899/38/3/035007

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.

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