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We calculate the leading-twist O(alphas^2 beta0) corrections to the B to pitransition form factor f+(0) in light-cone sum rules. We find that, asexpected, there is a cancellation between the O(alphas^2 beta0) corrections tofB f+(0) and the large corresponding corrections to fB, calculated in QCD sumrules. This suggests the insensitivity of the form factors calculated in thelight-cone sum rules approach to this source of radiative corrections. Wefurther obtain an improved determination of the CKM matrix element |V(ub)|,using latest results from BaBar and Belle for f+(0)|V(ub)|.

Two-loop Corrections to the B to pi Form Factor from QCD Sum Rules on the Light-Cone and |V(ub)|