Investigation of the second moment of the nucleon’sg1andg2structure functions in two-flavor lattice QCD

2005/06/30 by M. Göckeler, R. Horsley, D. Pleiter +6 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Lattice QCD #Nuclear physics #Nucleon #Particle physics #Particle physics theoretical and experimental studies #Physics #Proton #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #Quark #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevd.72.054507

published as Phys.Rev.D72:054507,2005 · 9 pages, 9 figures, 5 tables, revised version: estimate of systematic uncertainty in chiral extrapolation, 2 references added, version to appear in Phys.Rev.D

arxiv created 2005/09/05 · openalex publication_date 2005/09/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The reduced matrix elements a₂ and d₂ are computed in lattice QCD with N_f=2 flavors of light dynamical (sea) quarks. For proton and neutron targets we obtain as our best estimates d₂^(p)=0.004(5) and d₂⁽ⁿ⁾=\ensuremath-0.001(3), respectively, in the MS scheme at Q²=5 GeV², while for a₂ we find a₂^(p)=0.077(12) and a₂⁽ⁿ⁾=\ensuremath-0.005(5), where the errors are purely statistical.

Citations

• Precision measurement of the proton and deuteron spin structure functions g2 and asymmetries A2
• Non-perturbative renormalisation of composite operators in lattice QCD
• A lattice determination of moments of unpolarized nucleon structure functions using improved Wilson fermions

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