The Isgur-Wise Function: A Lattice Determination from Pseudoscalar --> Pseudoscalar Form Factors

Abstract

Form factors for pseudoscalar --> pseudoscalar decays of heavy-light mesons are found in quenched lattice QCD with heavy-quark masses in the range of approximately 1-2 GeV. The Isgur-Wise function, $\hat{I}¾(\ddot{I}‰)$, is extracted from these form factors. Results are in good agreement with $\hat{I}¾(\ddot{I}‰)$ derived from CLEO measurements for B --> D*.

at LATTICE 93. (4 pages, LaTeX, 1 PostScript figure appended) Edinburgh 93/539, FERMILAB-CONF-93/390-T