A lattice QCD study of the $B\to \pi \pi \ell \bar{\nu }$ transition

Luka Leskovec, Stefan Meinel, Marcus Petschlies +4

$V_{ub}$ is the smallest and least known of all CKM matrix elements; the community currently determines its magnitude primarily through the exclusive process $B\to \pi \ell \bar{\nu }$. Here…