English

The B -> D* l nu Form Factor at Zero Recoil

High Energy Physics - Lattice 2015-06-25 v1 High Energy Physics - Phenomenology

Abstract

We describe a model independent lattice QCD method for determining the deviation from unity for h_{A1}(1), the B -> D* l nu form factor at zero recoil. We extend the double ratio method previously used to determine the B -> D l nu form factor. The bulk of statistical and systematic errors cancel in the double ratios we consider, yielding form factors which promise to reduce present theoretical uncertainties in the determination of V_{cb}. We present results from a prototype calculation at a single lattice spacing corresponding to beta=5.7.

Cite

@article{arxiv.hep-lat/9910026,
  title  = {The B -> D* l nu Form Factor at Zero Recoil},
  author = {J. N. Simone and S. Hashimoto and A. X. El-Khadra and A. S. Kronfeld and P. B. Mackenzie and S. M. Ryan},
  journal= {arXiv preprint arXiv:hep-lat/9910026},
  year   = {2015}
}

Comments

Lattice99(heavyquarks); 3 pgs, LaTeX

R2 v1 2026-07-22T13:24:17.216Z