O(alpha_s^2) corrections to b -> c decay at zero recoil

Details O(alpha_s^2) corrections to b -> c decay at zero recoil O(alpha_s^2) corrections to b -> c decay at zero recoil

1997-11-30

arxiv.org/abs/hep-ph/9712205v1

Eur.Phys.J.C5:517-524,1998

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 12 pages, 13 postscript figures included with epsfig

Scientific paper

10.1007/s100520050296

Analytic formulae are presented for the two-loop perturbative QCD corrections
to b -> c decay at the zero recoil point, which are required for the extraction
of |V_bc| from measurements of exclusive B -> D* l nu decays. The results are
in agreement with those of Czarnecki and Melnikov. Some comments on the
numerical evaluation of the diagrams involved are made.

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