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We calculate the higher-twist corrections to the QCD light-cone sum rule forthe $B \to \pi$ transition form factor. The light-cone expansion of the massivequark propagator in the external gluonic field is extended to include new termscontaining the derivatives of gluon-field strength. The resulting analyticalexpressions for the twist-5 and twist-6 contributions to the correlationfunction are obtained in a factorized approximation, expressed via the productof the lower-twist pion distribution amplitudes and the quark-condensatedensity. The numerical analysis reveals that new higher-twist effects for the$B \to \pi$ form factor are strongly suppressed. This result justifies theconventional truncation of the operator product expansion in the light-cone sumrules up to twist-4 terms.

Higher-Twist Effects in Light-Cone Sum Rule for the $B\to\pi$ Form Factor