Semileptonic and Rare B Decays at B Factories

This is a review of the time‐independent measurements using semileptonic and rare B meson decays at the Babar, Belle and CLEO experiments. These measurements allow the constraint of the Unitarity Triangle in the Standard Model and to search for hints of new physics. At first, we summarize the measurements of Vcb and Vub using semileptonic decays. Then we review results on rare B decays, which include purely leptonic, radiative, B → D(*)K(*), charmless hadronic, and electroweak penguin decays.