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

Yong-Kang Huang, Dong-Hao Li, Cai-Dian Lü +2

By incorporating the available leading-power results at $\mathcal{O}({\alpha }_s)$ and next-to-leading-power corrections at tree level, we compute the $\mathcal{O}({\alpha }_s^2{\beta }_0)$ contribution…