Complete O({alpha}{sub s}{sup 2}) corrections to zero-recoil sum rules for B{r_arrow}D{sup {asterisk}} transitions
- Institut fuer Theoretische Teilchenphysik, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)
- Theoretical Physics Institute, University of Minnesota, Minneapolis, Minnesota 55455 (United States)
We present the complete O({alpha}{sub s}{sup 2}) corrections to the Wilson coefficient of the unit operator in the zero-recoil sum rule for the B{r_arrow}D{sup {asterisk}} 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 {vert_bar}V{sub cb}{vert_bar} extracted from semileptonic B{r_arrow}D{sup {asterisk}} 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}{sub s}) corrections to a number of power-suppressed operators are calculated. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 567126
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 3 Vol. 57; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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