Speaker
Dr.
Alexey Luchinsky
(Institute for High Energy Physics)
Description
In the presented paper production of charmonium state $\mathcal{Q}$ in exclusive $W\to\mathcal{Q} D_s^{(*)}$ decays is analyzed in the framework of both leading order Nonrelativistic Quantum Chromodynamics (NRQCD) and light-cone expansion (LC) models. Analytical and numerical predictions for the branching fractions of these decays in both approaches are given. The typical value of the branching fractions is $\sim 10^{-11}$ and it turns out that the LC results are about 4 times lager than NRQCD ones, so the effect of internal quark should be taken into account. Some estimates of color-octet contributions are presented and it is shown, that these contributions could be comparable with color-singlet results.
Primary authors
Dr.
Alexey Luchinsky
(Institute for High Energy Physics)
Dr.
Anatoly Lihoded
(Institute for High Energy Physics)
