Next-to-leading order QCD corrections to χcJW+b associated production from top-quark decay

We calculate the next-to-leading order QCD corrections to the excited charmonium χcJ associated with W+b production from top-quark decay. Our results show that detecting the χc0 production from top-quark decay is very difficult, but the χc1 and χc2 productions have the potential to be detected at the LHC. If the prompt χcJ production from top-quark decay is really detected at the LHC, it will be useful not only for investigating J/ψ production from top-quark decay but also for understanding the heavy quarkonium production mechanism.