%0 Journal Article
%T Color-Octet Charmonium Production in Top Quark Decays
%A Cong-feng Qiao
%A Kuang-Ta Chao
%J Physics
%D 1996
%I arXiv
%R 10.1103/PhysRevD.55.2837
%X We calculate the direct production rate of $J/\psi$ in top quark decays. The color-octet $J/\psi$ production via $t\rightarrow W^+ b J/\psi$ is shown to have a large branching ratio of order $1.5\times 10^{-4}$, which is over an order of magnitude higher than that of the color-singlet $J/\psi$ production via $t\rightarrow W^+ b J/\psi~g~g $ or $t\rightarrow W^+ b~\chi_{cJ}~g$ followed by $\chi_{cJ}\rightarrow J/\psi~\gamma$. This result can be used as a powerful tool to test the importance of the color-octet mechanism in heavy quarkonium production.
%U http://arxiv.org/abs/hep-ph/9606462v1