Application of heavy-quark effective theory to lattice QCD: Power corrections

2000/02/29 by Andreas S. Kronfeld · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevd.62.014505

published as Phys.Rev. D62 (2000) 014505 · 41 pp., no figs; Phys Rev D version, improving argument that an HQET holds for all m_Qa

arxiv created 2000/05/02 · openalex publication_date 2000/06/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Heavy-quark effective theory (HQET) is applied to lattice QCD with Wilson fermions at fixed lattice spacing a. This description is possible because heavy-quark symmetries are respected. It is desirable because the ultraviolet cutoff 1/a in current numerical work and the heavy-quark mass m_Q are comparable. Effects of both short distances a and 1/m_Q are captured fully into coefficient functions, which multiply the operators of the usual HQET. Standard tools of HQET are used to develop heavy-quark expansions of lattice observables and, thus, to propagate heavy-quark discretization errors. Three explicit examples are given: namely, the mass, decay constant, and semileptonic form factors of heavy-light mesons.

Citations

• Lattice QCD calculation ofB¯→Dlν¯decay form factors at zero recoil

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