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

Xiao-Hai Liu, Qiang Zhao

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 hig…