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Perturbative QCD correction to the B → π transition form factor

A. Khodjamirian, R. Rückl, S. Weinzierl, O. Yakovlev
1997 Physics Letters B  

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1997 pre-print arXiv:hep-ph/9706303v1 fatcat:wzwjmptgrnbbvgpstrwjx6d4bm
We report on the perturbative O(α_s) correction to the light-cone QCD sum rule for the B→π transition form factor f^+. The correction to the product f_Bf^+ in leading twist approximation is found to be about 30 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.
doi:10.1016/s0370-2693(97)00936-2 fatcat:z7bujnchbndv5ejrduotashlvy
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A. Khodjamirian, R. Rückl, S. Weinzierl, O. Yakovlev. "Perturbative QCD correction to the B → π transition form factor." Physics Letters B 410.2-4 (1997) 275-284