Axial nucleon form factors from lattice QCD

Journal Article · Tue Feb 15 04:00:00 EST 2011 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.83.045010· OSTI ID:21505016

Alexandrou, C ^[1]; Brinet, M; Carbonell, J; Harraud, P A; Papinutto, M ^[2]; Constantinou, M ^[1]; Guichon, P ^[3]; Jansen, K ^[4]; Korzec, T ^[1]

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1. Department of Physics, University of Cyprus, P.O. Box 20537, 1678 Nicosia (Cyprus)
2. Laboratoire de Physique Subatomique et Cosmologie, UJF/CNRS/IN2P3, 53 avenue des Martyrs, 38026 Grenoble (France)
3. CEA-Saclay, IRFU/Service de Physique Nucleaire, 91191 Gif-sur-Yvette (France)
4. NIC, DESY, Platanenallee 6, D-15738 Zeuthen (Germany)

We present results on the nucleon axial form factors within lattice QCD using two flavors of degenerate twisted mass fermions. Volume effects are examined using simulations at two volumes of spatial length L=2.1 fm and L=2.8 fm. Cut-off effects are investigated using three different values of the lattice spacings, namely a=0.089 fm, a=0.070 fm and a=0.056 fm. The nucleon axial charge is obtained in the continuum limit and chirally extrapolated to the physical pion mass enabling comparison with experiment.

• OSTI ID: 21505016
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 4 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BARYONS
BOSONS
COMPARATIVE EVALUATIONS
COMPOSITE MODELS
CONSTRUCTIVE FIELD THEORY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
EVALUATION
FERMIONS
FIELD THEORIES
FLAVOR MODEL
FORM FACTORS
HADRONS
LATTICE FIELD THEORY
MASS
MATHEMATICAL MODELS
MESONS
NUCLEONS
PARTICLE MODELS
PARTICLE PROPERTIES
PIONS
PSEUDOSCALAR MESONS
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARK MODEL
SIMULATION