Study of B0-->J/Psi D(*) and etac D(*) in Perturbative QCD

Details Study of B0-->J/Psi D(*) and etac D(*) in Perturbative QCD Study of B0-->J/Psi D(*) and etac D(*) in Perturbative QCD

2001-07-05

arxiv.org/abs/hep-ph/0107043v2

Phys.Rev. D65 (2002) 037504

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 3 figures, to appear in PRD

Scientific paper

10.1103/PhysRevD.65.037504

Motivated by recent interest in soft $J/\Psi$ production in B decays, we investigate ${B}^0 \to J/\Psi D^{(\star)}$ and $\eta_c D^{(\star)}$ decays in perturbative QCD. We find that, within that framework, these decays are calculable since the heavy $c\bar{c}$ pair in the final states is created by a hard gluon. The branching ratios are estimated to be around $10^{-7}\sim 10^{-8}$, too small to be consistent with the data, suggesting that other mechanism(s) contribute to the observed excess of soft $J/\Psi$ in ${B}^0 \to J/\Psi + X$ decays. The possibility of the production of a hybrid $s{\bar d}g$ meson with mass about 2 GeV is briefly entertained.

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