Nucleon structure in the chiral regime with domain wall fermions on an improved staggered sea
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.
- Research Organization:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Organization:
- USDOE - Office of Energy Research (ER)
- DOE Contract Number:
- FC02-94ER40818; AC05-06OR23177; AC04-84150
- OSTI ID:
- 894645
- Report Number(s):
- JLAB-THY-06-553; DOE/ER/40150-4104; hep-lat/0610007; TRN: US0700190
- Resource Relation:
- Conference: XXIVth International Symposium on Lattice Field Theory (Lattice 2006), 23-28 Jul 2006, Tucson, Arizona
- Country of Publication:
- United States
- Language:
- English
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