Techniques for computing two-loop QCD corrections to b-->c transitions

@article{Czarnecki1997TechniquesFC,
  title={Techniques for computing two-loop QCD corrections to b-->c transitions},
  author={A. Czarnecki and K. Melnikov},
  journal={Physical Review D},
  year={1997},
  volume={56},
  pages={7216-7227}
}
We have recently presented the complete O({alpha}{sub s}{sup 2}) corrections to the semileptonic decay width of the b quark at maximal recoil. Here we discuss various technical aspects of that calculation and further applications of similar methods. In particular, we describe an expansion which facilitates the phase space integrations and the treatment of the mixed real-virtual corrections, for which Taylor expansion does not work and the so-called eikonal expansion must be employed. Several… Expand
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