Nucleon Generalized Parton Distributions from Full Lattice QCD

Details Nucleon Generalized Parton Distributions from Full Lattice QCD Nucleon Generalized Parton Distributions from Full Lattice QCD

2007-05-30

arxiv.org/abs/0705.4295v2

Phys.Rev.D77:094502,2008

Physics

High Energy Physics

High Energy Physics - Lattice

40 pages, 49 figures; Revised chiral extrapolations in sections A-K, main conclusions unchanged

Scientific paper

10.1103/PhysRevD.77.094502

We present a comprehensive study of the lowest moments of nucleon generalized parton distributions in N_f=2+1 lattice QCD using domain wall valence quarks and improved staggered sea quarks. Our investigation includes helicity dependent and independent generalized parton distributions for pion masses as low as 350 MeV and volumes as large as (3.5 fm)^3, for a lattice spacing of 0.124 fm. We use perturbative renormalization at one-loop level with an improvement based on the non-perturbative renormalization factor for the axial vector current, and only connected diagrams are included in the isosinglet channel.

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