Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2007-10-06
PoSLAT2007:160,2007
Physics
High Energy Physics
High Energy Physics - Lattice
Presented at the XXV International Symposium on Lattice Field Theory, July 30 - August 4 2007, Regensburg, Germany
Scientific paper
Moments of the generalized parton distributions of the nucleon, calculated with a mixed action of domain wall valence quarks and asqtad staggered sea quarks, are presented for pion masses extending down to 359 MeV. Results for the moments of the unpolarized, helicity, and transversity distributions are given and compared to the available experimental measurements. Additionally, a selection of the generalized form factors are shown and the implications for the spin decomposition and transverse structure of the nucleon are discussed. Particular emphasis is placed on understanding systematic errors in the lattice calculation and exploring a variety of chiral extrapolations.
Bratt Jonathan
Edwards Robert G.
Engelhardt Michael
Fleming George
Hägler Ph.
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