B → D*lv at non-zero recoil

¹ Department of Physics and Astronomy, University of Utah, Salt Lake City, Utah, 84112, USA
² Department of Physics, Syracuse University, Syracuse, New York, 13244, USA
³ Department of Physics, University of Illinois, Urbana, Illinois, 61801, USA
⁴ Fermi National Accelerator Laboratory, Batavia, Illinois, 60510, USA
⁵ Institute for Advanced Study, Technische Universität München, 85748 Garching, Germany

^* Speaker, e-mail: alexvaq@physics.utah.edu

Published online: 26 March 2018

Abstract

We present preliminary results from our analysis of the form factors for the B → D*lv 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|.