Parameters of Heavy Quark Effective Theory from Nf=2 lattice QCD
Abstract
We report on a non-perturbative determination of the parameters of the lattice Heavy Quark Effective Theory (HQET) Lagrangian and of the time component of the heavy-light axial-vector current with Nf=2 flavors of massless dynamical quarks. The effective theory is considered at the 1/mh order, and the heavy mass mh covers a range from slightly above the charm to beyond the beauty region. These HQET parameters are needed to compute, for example, the b-quark mass, the heavy-light spectrum and decay constants in the static approximation and to order 1/mh in HQET. The determination of the parameters is done non-perturbatively. The computation reported in this paper uses the plaquette gauge action and two different static actions for the heavy quark described by HQET. For the light-quark action we choose non-perturbatively O(a)-improved Wilson fermions.
Keywords
Cite
@article{arxiv.1203.6516,
title = {Parameters of Heavy Quark Effective Theory from Nf=2 lattice QCD},
author = {Benoit Blossier and Michele Della Morte and Patrick Fritzsch and Nicolas Garron and Jochen Heitger and Hubert Simma and Rainer Sommer and Nazario Tantalo},
journal= {arXiv preprint arXiv:1203.6516},
year = {2012}
}
Comments
24 pages, 9 figures, 4 tables