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HQET at order 1/m: I. Non-perturbative parameters in the quenched approximation

  • ALPHA Collaboration
  • Benoît Blossier
  • Michele Della Morte
  • Nicolas GarronEmail author
  • Rainer Sommer
Open Access
Article

Abstract

We determine non-perturbatively the parameters of the lattice HQET Lagrangian and those of the time component of the heavy-light axial-vector current in the quenched approximation. The HQET expansion includes terms of order 1/m b. Our results allow to compute, for example, the heavy-light spectrum and B-meson decay constants in the static approximation and to order 1/m b in HQET. The determination of the parameters is separated into universal and non-universal parts. The universal results can be used to determine the parameters for various discretizations. The computation reported in this paper uses the plaquette gauge action and the “HYP1/2” action for the b-quark described by HQET. The parameters of the current also depend on the light-quark action, for which we choose non-perturbatively O(a)-improved Wilson fermions.

Keywords

Lattice QCD B-Physics Heavy Quark Physics 

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© The Author(s) 2010

Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.

Authors and Affiliations

  • ALPHA Collaboration
  • Benoît Blossier
    • 1
  • Michele Della Morte
    • 2
  • Nicolas Garron
    • 3
    • 4
    Email author
  • Rainer Sommer
    • 5
  1. 1.Laboratoire de Physique ThéoriqueUniversité Paris XIOrsay CedexFrance
  2. 2.Institut für KernphysikUniversity of MainzMainzGermany
  3. 3.Departamento de Física Teórica and Instituto de Física Teórica IFT-UAM/CSICUniversidad Autónoma de MadridMadridSpain
  4. 4.School of Physics and AstronomyUniversity of EdinburghEdinburghU.K.
  5. 5.NIC, DESYZeuthenGermany

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