Determining $|V_{ub}|$ from the $\bar{B}\to X_u\ell \bar{\nu }$ dilepton invariant mass spectrum

Christian W. Bauer, Zoltan Ligeti, Michael Luke

The invariant mass spectrum of the lepton pair in inclusive semileptonic $\bar{B}\to X_u\ell \bar{\nu }$ decay yields a model independent determination of $|V_{ub}|$. Unlike the lepton e…