Complete O(alpha_s^2) Corrections to Zero-Recoil Sum Rules for B-->D* Transitions

Abstract

We present the complete O(alpha_s^2) corrections to the Wilson coefficient of the unit operator in the zero-recoil sum rule for the B-->D* transition. We include both perturbative and power-suppressed nonperturbative effects in a manner consistent with the operator product expansion. The impact of these corrections on |V_cb| extracted from semileptonic B-->D* decays near zero recoil is discussed. The mixing of the heavy quark kinetic operator with the unit operator at the two loop level is obtained. O(alpha_s) corrections to a number of power-suppressed operators are calculated.

13 pages, revtex

References in corpus (5)

• Aspects Of Heavy Quark Theory
• High Power n of m_b in Beauty Widths and n=5 -> oo Limit
• Two-loop QCD Corrections to $b\to c$ Transitions at Zero Recoil: Analytical Results
• Two-loop QCD corrections to semileptonic b decays at maximal recoil
• Abnormal Structure of Fermion Mixings in a Seesaw Quark Mass Matrix Model

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