Global NLO Analysis of Nuclear Parton Distribution Functions
- Department of Physics, Juntendo University, Inba, Chiba, 270-1695 (Japan)
- Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) 1-1, Ooho, Tsukuba, Ibaraki, 305-0801 (Japan)
- Department of Particle and Nuclear Studies, Graduate University for Advanced Studies 1-1, Ooho, Tsukuba, Ibaraki, 305-0801 (Japan)
Nuclear parton distribution functions (NPDFs) are determined by a global analysis of experimental measurements on structure-function ratios F{sub 2}{sup A}/F{sub 2}{sup A{sup '}} and Drell-Yan cross section ratios {sigma}{sub DY}{sup A}/{sigma}{sub DY}{sup A{sup '}}, and their uncertainties are estimated by the Hessian method. The NPDFs are obtained in both leading order (LO) and next-to-leading order (NLO) of {alpha}{sub s}. As a result, valence-quark distributions are relatively well determined, whereas antiquark distributions at x>0.2 and gluon distributions in the whole x region have large uncertainties. The NLO uncertainties are slightly smaller than the LO ones; however, such a NLO improvement is not as significant as the nucleonic case.
- OSTI ID:
- 21055334
- Journal Information:
- AIP Conference Proceedings, Vol. 981, Issue 1; Conference: NuFact 07: 9. international workshop on neutrino factories, superbeams and beta beams, Okayama (Japan), 6-11 Aug 2007; Other Information: DOI: 10.1063/1.2898955; (c) 2008 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
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