Quark Contributions to Nucleon Momentum and Spin from Domain Wall fermion calculations

Conference · Thu Dec 01 00:00:00 EST 2011 · PoS

OSTI ID:1054914

Syritsyn, Sergey N.; Green, Jeremy R. ^[1]; Negele, John W. ^[1]; Pochinsky, Andrew ^[1]; Hagler, Philipp G. ^[2]; Musch, Bernhard U. ^[2]; Schroers, Wolfram

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1. MIT
2. Tech. U. Munich

We report contributions to the nucleon spin and momentum from light quarks calculated using dynamical domain wall fermions with pion masses down to 300 MeV and fine lattice spacing a=0.084 fm. Albeit without disconnected diagrams, we observe that spin and orbital angular momenta of both u and d quarks are opposite, almost canceling in the case of the d quark, which agrees with previous calculations using a mixed quark action. We also present the full momentum dependence of n=2 generalized form factors showing little variation with the pion mass.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• DOE Contract Number: FG02-94ER40818; DEAC02- 05CH11231; AC05-06OR23177; FG02-96ER40965
• OSTI ID: 1054914
• Report Number(s): JLAB-THY-11-1451; DOE/OR/23177-1965; arXiv:1111.0718
• Journal Information: PoS, Vol. LATTICE2011; Conference: 29th International Symposium on Lattice Field Theory (Lattice 2011), Squaw Valley, California, 10-16 Jul 2011
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS