Moments of generalized parton distribution functions and the nucleon spin contents
Journal Article
·
· Physical Review. D, Particles Fields
- Department of Physics, Faculty of Science, Osaka University, Toyonaka, Osaka 560-0043 (Japan)
It is shown that, based only upon empirically and semiempirically known facts together with some reasonable theoretical postulates, we are inevitably led to a novel conclusion that the quark orbital angular momentum carries nearly half of the total nucleon spin at the low energy scale around Q{sup 2}{approx_equal}(600 MeV){sup 2}. We also perform an explicit model analysis to find that the quark spin fraction {delta}{sigma} is extremely sensitive to the pion mass, which may resolve the discrepancy between the observation and the prediction of the recent lattice QCD simulation carried out in the heavy pion region.
- OSTI ID:
- 20713631
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 72, Issue 7; Other Information: DOI: 10.1103/PhysRevD.72.074006; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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