Parameters of heavy quark effective theory from N-f=2 lattice QCD

Benoit Blossier, Michele Della Morte, Patrick Fritzsch, Nicolas Garron, Jochen Heitger, Hubert Simma, Rainer Sommer, Nazario Tantalo

Research output: Contribution to journalArticlepeer-review

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 N-f = 2 flavors of massless dynamical quarks. The effective theory is considered at the 1/m(h) order, and the heavy mass m(h) 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/m(h) 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.

Original languageEnglish
Article number132
Pages (from-to)-
Number of pages27
JournalJournal of High Energy Physics
Issue number9
DOIs
Publication statusPublished - Sep 2012

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