# Lattice Heavy Quark Effective Theory and the Isgur-Wise function

## TL;DR

This paper calculates the Isgur-Wise function using lattice heavy quark effective theory, incorporating kinetic energy and non-perturbative velocity renormalization to improve understanding of heavy meson decays.

## Contribution

It introduces a lattice formulation of heavy quark effective theory including kinetic terms and non-perturbative velocity renormalization, providing new insights into the Isgur-Wise function.

## Key findings

- Computed the slope parameter at zero recoil for three heavy quark masses.
- Performed calculations at $eta=6.0$ on a $24^3 imes 48$ lattice.
- Demonstrated non-perturbative velocity renormalization on the lattice.

## Abstract

We compute the Isgur-Wise function using heavy quark effective theory formulated on the lattice. The non-relativistic kinetic energy term of the heavy quark is included to the action as well as terms remaining in the infinite quark mass limit. The classical velocity of the heavy quark is renormalized on the lattice and we determine the renormalized velocity non-perturbatively using the energy-momentum dispersion relation. The slope parameter of the Isgur-Wise function at zero recoil is obtained at $\beta=6.0$ on a $24^3\times 48$ lattice for three values of $m_{Q}$.