Improved Heavy Quark Effective Theory Currents

Abstract

It is hoped that the accuracy of a variety of lattice calculations will be improved by perturbatively eliminating effects proportional to the lattice spacing. In this paper, we apply this improvement program to the heavy quark effective theory currents which cause a heavy quark to decay to a light quark, and renormalize the resulting operators to order $\alphaS$. We find a small decrease in the amount that the operator needs to be renormalized, relative to the unimproved case.

10 pages, 6 figures

References in corpus (1)

• Point-Split Lattice Operators for B Decays

Cited by in corpus (13)

• Properties of B-Mesons in Lattice QCD
• Quenched Heavy-Light Decay Constants
• Heavy Quark Spectroscopy and Matrix Elements: A Lattice Study using the Static Approximation
• Perturbation Theory for Fat-link Fermion Actions
• Leptonic Decays of Heavy Quarks on the Lattice
• A High Statistics Lattice Calculation of $f_B^{static}$ at $\beta =6.2$ Using the Clover Action
• Heavy Quarks on the Lattice
• Heavy-Light Mesons with Quenched Lattice NRQCD: Results on Decay Constants
• A Rigourous Treatment of the Lattice Renormalization Problem of F_B
• Heavy-light and light-light weak matrix elements on the lattice
• Non-perturbative renormalization of the $\Delta S=2$ operator and the heavy-light axial current
• Leptonic Decays of Heavy-Light Systems
• Quenched Heavy-Light Decay Constants