Lattice HQET Calculation of the Isgur-Wise Function

Christensen, Joseph; Draper, Terrence; McNeile, Craig

Lattice HQET Calculation of the Isgur-Wise Function

Authors

Christensen, Joseph

Draper, Terrence

McNeile, Craig

Description

We calculate the Isgur-Wise function on the lattice, simulating the light quark with the Wilson action and the heavy quark with a direct lattice implementation of the heavy-quark effective theory. Improved smearing functions produced by a variational technique, MOST, are used to reduce the statistical errors and to minimize excited-state contamination of the ground-state signal. Calculating the required matching factors, we obtain $ξ'(1)=-0.64(13)$ for the slope of the Isgur-Wise function in continuum-HQET in the $\barMS$ scheme at a scale of $4.0 $GeV.
3 Pages, LaTeX, Poster at Lattice '97