Color-singlet and color-octet J/psi production in top quark rare decays
Feng Yuan, Cong-Feng Qiao, Kuang-Ta Chao
Abstract
J/psi production in top quark rare decays is investigated under the framework of NRQCD factorization formalism. Various production channels are studied, and we find that the contributions from the color-singlet quark fragmentation and the color-octet gluon fragmentation are both over 3 orders larger than that from the leading order color-singlet process. The numerical results show that the branching ratio B(t -> c + J/psi + X) is about 10-14 in the SM, and 10-10 in the MSSM.
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