Top-quark decay at next-to-next-to-leading order in QCD.

@article{Gao2013TopquarkDA,
  title={Top-quark decay at next-to-next-to-leading order in QCD.},
  author={Jun Gao and Chong-Sheng Li and Hua Xing Zhu},
  journal={Physical review letters},
  year={2013},
  volume={110 4},
  pages={
          042001
        }
}
We present the complete calculation of the top-quark decay width at next-to-next-to-leading order in QCD, including next-to-leading electroweak corrections as well as finite bottom quark mass and W boson width effects. In particular, we also show the first results of the fully differential decay rates for the top-quark semileptonic decay t → W(+)(l(+)ν)b at next-to-next-to-leading order in QCD. Our method is based on the understanding of the invariant mass distribution of the final-state jet in… 

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