arXiv:1011.2166·v1·High Energy Physics — Lattice
B -> D* l nu at zero recoil: an update
Jon A. Bailey🇺🇸 · A. Bazavov🇺🇸 · C. Bernard🇺🇸 · C.M. Bouchard🇺🇸 · C. DeTar🇺🇸 · A.X. El-Khadra🇺🇸 · E.D. Freeland🇺🇸 · E. Gámiz🇺🇸 · Steven Gottlieb🇺🇸 · U.M. Heller🇺🇸 · J.E. Hetrick🇺🇸 · A.S. Kronfeld🇺🇸
Abstract
We present an update of our calculation of the form factor for B -> D* l nu at zero recoil, with higher statistics and finer lattices. As before, we use the Fermilab action for b and c quarks, the asqtad staggered action for light valence quarks, and the MILC ensembles for gluons and light quarks (Lüscher-Weisz married to 2+1 rooted staggered sea quarks). In this update, we have reduced the total uncertainty on F(1) from 2.6% to 1.7%. At Lattice2010 we presented a still-blinded result, but this writeup includes the unblinded result from the September 2010 CKM workshop.
Comments: 7 pp., 2 figs, presented at Lattice 2010, June 14-19, 2010, Villasimius, Italy