Color-Octet Charmonium Production in Top Quark Decays

Abstract

We calculate the direct production rate of $J/\psi$ in top quark decays. The color-octet $J/\psi$ production via $t\to W^{+}bJ/\psi$ 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 $t\to W^{+}bJ/\psi gg$ or $t\to W^{+}b{\chi }_{cJ}g$ followed by ${\chi }_{cJ}\to J/\psi \gamma$. This result can be used as a powerful tool to test the importance of the color-octet mechanism in heavy quarkonium production.

10 pages LaTex (2 figures in PS-file)

References in corpus (10)

• Rigorous QCD Analysis of Inclusive Annihilation and Production of Heavy Quarkonium
• Observation of Top Quark Production in Pbar-P Collisions
• Observation of the Top Quark
• Color-octet quarkonia production
• Color-Octet Fragmentation and the psi' Surplus at the Tevatron
• Quarkonium Wave Functions at the Origin
• Charmonium Production at the Tevatron
• Gluon Fragmentation into P-wave Heavy Quarkonium
• Top Quark Decays into Heavy Quark Mesons
• Production of heavy quarks and heavy quarkonia

Cited by in corpus (2)

• Color-singlet and color-octet J/psi production in top quark rare decays
• Next-to-leading order QCD corrections to ${\chi }_{cJ}{W}^{+}b$ associated production from top-quark decay