2005/03/31 by Q. Mason, Quentin Mason, H. D. Trottier +10 · 100 citations
Physics and Astronomy · #Hadron #High-Energy Particle Collisions Research #Lattice QCD #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #hep-lat #hep-ph
paper · pdf · doi:10.1103/physrevlett.95.052002
published in Physical Review Letters 95(5), 052002 (American Physical Society) · 4 pages, 2 figures, 1 table. The revised version differs from the original because we now use 4-loop beta functions (rather than 3-loop). This shifts the answer a little (mostly from the evolution from the lattice scale to M_z -- lattice results aren't very different) and reduces the error slightly
arxiv created 2005/06/30 · openalex publication_date 2005/07/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We obtain a new value for the QCD coupling constant by combining lattice QCD simulations with experimental data for hadron masses. Our lattice analysis is the first to (1) include vacuum polarization effects from all three light-quark flavors (using MILC configurations), (2) include third-order terms in perturbation theory, (3) systematically estimate fourth and higher-order terms, (4) use an unambiguous lattice spacing, and (5) use an [symbol: see text](a2)-accurate QCD action. We use 28 different (but related) short-distance quantities to obtain alpha((5)/(MS))(M(Z)) = 0.1170(12).