J PSI PRODUCTION IN TOP-QUARK DECAYS

Authors
QIAO CF CHAO KT
Citation
Cf. Qiao et Kt. Chao, J PSI PRODUCTION IN TOP-QUARK DECAYS, Physical review. D. Particles and fields, 55(5), 1997, pp. 2837-2839
Citations number
30
Categorie Soggetti
Physics, Particles & Fields
Journal title
Physical review. D. Particles and fields → ACNP
ISSN journal
05562821
Volume
55
Issue
5
Year of publication
1997
Pages
2837 - 2839
Database
ISI
SICI code
0556-2821(1997)55:5<2837:JPPITD>2.0.ZU;2-O
Abstract
We calculate the direct production rate of J/psi in top quark decays. The color-octet J/psi production via t-->W(+)bJ/psi is shown to have a large branching ratio of order 1.5x10(-4), which is over an order of magnitude higher than that of the color-singlet J/psi production via t -->W(+)bJ/psi gg or t-->W(+)b chi(cJ)g followed by chi(cJ)-->J/psi gam ma. Our result can also be used as a tool to test the importance of th e color-octet mechanism in heavy quarkonium production in the future.