$B\to \pi \pi$ Form Factors from Light-Cone Sum Rules with $B$-meson Distribution Amplitudes

Shan Cheng, Alexander Khodjamirian, Javier Virto

We study $B\to \pi \pi$ form factors using QCD light-cone sum rules with $B$-meson distribution amplitudes. These form factors describe the semileptonic decay $B\to \pi \pi \ell {\bar{\nu }}_{\ell }$,…