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arXiv · hep-ph/9706303

Perturbative QCD Correction to the $B\toπ$ Transition Form Factor

A. Khodjamirian·R. Rückl·S. Weinzierl·O. Yakovlev
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Abstract

We report on the perturbative $O(α_s)$ correction to the light-cone QCD sum rule for the $B\to π$ transition form factor $f^+$. The correction to the product $f_Bf^+$ in leading twist approximation is found to be about 30%, that is similar in magnitude to the corresponding $O(α_s)$ correction in the two-point sum rule for $f_B$. The resulting cancellation of large QCD corrections in $f^+$ eliminates one important uncertainty in the sum-rule prediction for this form factor.

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A. Khodjamirian, R. Rückl, S. Weinzierl, O. Yakovlev. 1997-06-09. Perturbative QCD Correction to the $B\toπ$ Transition Form Factor. https://doi.org/10.1016/s0370-2693(97)00936-2

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