Partial Next-to-Next-to-Leading-Order Corrections to the $B \to π$ Form Factors from Light-Cone Sum Rules

By incorporating the available leading-power results at $\mathcal{O}(α_s)$ and next-to-leading-power corrections at tree level, we compute the $\mathcal{O}(α_s^2β_0)$ contribution to the $B\toπ$ form factors in the large-recoil region using the light-cone sum rule approach with $B$-meson light-cone