Nucleon structure from mixed action calculations using 2+1 flavors of asqtad sea and domain wall valence fermions

Abstract

We present high statistics results for the structure of the nucleon from a mixed-action calculation using 2+1 flavors of asqtad sea and domain wall valence fermions. We perform extrapolations of our data based on different chiral effective field theory schemes and compare our results with available information from phenomenology. We discuss vector and axial form factors of the nucleon, moments of generalized parton distributions, including moments of forward parton distributions, and implications for the decomposition of the nucleon spin.

68 pages, 47 figures. Main revision points: improved discussion of chiral fits and systematic uncertainties, several minor refinements. Accepted for publication in Phys.Rev. D

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• Generalized parton distributions for the nucleon in chiral perturbation theory
• Gluon contributions to the pion mass and light cone momentum fraction
• Mixed Meson Masses with Domain-Wall Valence and Staggered Sea Fermions
• Exclusive rho-0 electroproduction on transversely polarized protons
• Phenomenological analysis of the nucleon spin contents and their scale dependence
• Understanding nucleon structure using lattice simulations

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