<i>B</i> → <i>D*l</i><i>v</i> at non-zero recoil

Abstract

We present preliminary results from our analysis of the form factors for the B → D*l v decay at non-zero recoil. Our analysis includes 15 MILC asqtad ensembles with N f = 2 + 1 flavors of sea quarks and lattice spacings ranging from a ≈ 0.15 fm down to 0.045 fm. The valence light quarks employ the asqtad action, whereas the heavy quarks are treated using the Fermilab action. We conclude with a discussion of future plans and phenomenological implications. When combined with experimental measurements of the decay rate, our calculation will enable a determination of the CKM matrix element | V cb |.