B meson decays using lattice QCD

B meson decays using lattice QCD

We perform a direct QCD simulation of bottom quarks on a fine space-time lattice.
While the previous lattice study of the B→D^*\(\ell\nu\) exclusive decay has been limited to small momentum recoils, we extend it to a wide kinematical region measured by experiments and to the corresponding inclusive decay.
In collaboration with analysis teams of the Belle II experiment, we develop observables and measurement method thereof, which are suitable to the application of lattice QCD.