We have tried to measure $|V_{ ub}|$ using inclusive semileptonic decay measurements with three different methods. The full reconstruction tag is the one of the most feasible method to measure inclusive process. Semileptonic $B\to D^{ (*)}\ell\nu$ tag is another method to separate signal and tag $B$ mesons. New kinematic variable is used to enhance double semileptonic decays of both $B$ meson. We also improve the neutrino reconstruction technique solving a combination of decay products into signal and tag $B$ mesons using the simulated annealing method.
Categories: hep-ex