Two-loop QCD corrections to semileptonic b decays at an intermediate recoil

Details Two-loop QCD corrections to semileptonic b decays at an intermediate recoil Two-loop QCD corrections to semileptonic b decays at an intermediate recoil

1998-04-02

arxiv.org/abs/hep-ph/9804215v1

Phys.Rev.D59:014036,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, revtex

Scientific paper

10.1103/PhysRevD.59.014036

We present complete O(alpha_s^2) corrections to the decay b-->c+l+nu at the
point where the invariant mass of the leptons sqrt{q^2} equals the c quark
mass. We use this result, together with previously obtained corrections at the
ends of the q^2 spectrum, to estimate the total width of the semileptonic b-->c
decay with O(alpha_s^2) accuracy, essential for the |V_{cb}| determination.

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