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Nucleon Structure in the Chiral Regime with Domain Wall Fermions on an Improved Staggered Sea
Robert G. Edwards
D. G. Richards
G. Fleming
Philipp Hägler
John W. Negele
Kostas Orginos
Dru B. Renner
A. V. Pochinsky
Ph. Hagler
W. Schroers
出版
United States. Department of Energy. Office of Energy Research
, 2006
URL
http://books.google.com.hk/books?id=zQNYAQAACAAJ&hl=&source=gbs_api
註釋
Moments of unpolarized, helicity, and transversity distributions, electromagnetic form factors, and generalized form factors of the nucleon are presented from a preliminary analysis of lattice results using pion masses down to 359 MeV. The twist two matrix elements are calculated using a mixed action of domain wall valence quarks and asqtad staggered sea quarks and are renormalized perturbatively. Several observables are extrapolated to the physical limit using chiral perturbation theory. Results are compared with experimental moments of quark distributions and electromagnetic form factors and phenomenologically determined generalized form factors, and the implications on the transverse structure and spin content of the nucleon are discussed.
