NLO corrections to ${\chi }_{bJ}$ to two-$J/\psi$ exclusive decay processes

Abstract

The next-to-leading order QCD corrections for ${\chi }_{bJ}$, the p-wave bottomonium, to $J/\psi$ pair decay processes are evaluated utilizing NRQCD factorization formalism. The scale dependence of ${\chi }_{b2}\to J/\psi J/\psi$ process is depressed with NLO corrections, and hence the uncertainties in the leading order results are greatly reduced. The total branch ratios are found to be the order of $10^{-5}$ for all three ${\chi }_{bJ}\to J/\psi J/\psi$ processes, indicating that they are observable in the LHC and super-B experiments.

Comments: To appear in PRD