$B\to \pi \ell {\nu }_l$ Width and $|V_{ub}|$ from QCD Light-Cone Sum Rules

A. Khodjamirian, Th. Mannel, N. Offen +1

We employ the $B\to \pi$ form factors obtained from QCD light-cone sum rules and calculate the $B\to \pi \ell {\nu }_l$ width ($\ell =e,\mu$) in units of $1/|V_{ub}{|}^2$, integrated over the regi…