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/mb. Our results allow to compute, for example, the heavy-light spectrum and B-meson decay constants in the static approximation and to order 1/mb 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.

Details

Title
HQET at order 1/m: I. Non-perturbative parameters in the quenched approximation
Author
Blossier Benoît 1 ; Della Morte Michele 2 ; Garron Nicolas 3 ; Sommer, Rainer 4 

 Université Paris XI, Laboratoire de Physique Théorique, Orsay Cedex, France (GRID:grid.5842.b) (ISNI:0000000121712558) 
 University of Mainz, Institut für Kernphysik, Mainz, Germany (GRID:grid.5802.f) (ISNI:0000000119417111) 
 Universidad Autónoma de Madrid, Departamento de Física Teórica and Instituto de Física Teórica IFT-UAM/CSIC, Madrid, Spain (GRID:grid.5515.4) (ISNI:0000000119578126); University of Edinburgh, School of Physics and Astronomy, Edinburgh, U.K. (GRID:grid.4305.2) (ISNI:0000000419367988) 
 NIC, DESY, Zeuthen, Germany (GRID:grid.7683.a) (ISNI:0000 0004 0492 0453) 
Publication year
2010
Publication date
Jun 2010
Publisher
Springer Nature B.V.
e-ISSN
10298479
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2398094169
Copyright
© 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. This work is published under https://creativecommons.org/licenses/by-nc/2.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.