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Title: Global NLO Analysis of Nuclear Parton Distribution Functions

Abstract

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.

Authors:
 [1];  [2];  [3]
  1. Department of Physics, Juntendo University, Inba, Chiba, 270-1695 (Japan)
  2. Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK) 1-1, Ooho, Tsukuba, Ibaraki, 305-0801 (Japan)
  3. Department of Particle and Nuclear Studies, Graduate University for Advanced Studies 1-1, Ooho, Tsukuba, Ibaraki, 305-0801 (Japan)
Publication Date:
OSTI Identifier:
21055334
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 981; Journal 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); Journal ID: ISSN 0094-243X
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; ANTIQUARKS; CROSS SECTIONS; DISTRIBUTION; DISTRIBUTION FUNCTIONS; DRELL MODEL; GLUONS; HEAVY ION REACTIONS; NEUTRINO OSCILLATION; PARTICLE KINEMATICS; QUANTUM CHROMODYNAMICS; STRUCTURE FUNCTIONS; VALENCE

Citation Formats

Hirai, M, Kumano, S, Department of Particle and Nuclear Studies, Graduate University for Advanced Studies 1-1, Ooho, Tsukuba, Ibaraki, 305-0801, and Nagai, T -H. Global NLO Analysis of Nuclear Parton Distribution Functions. United States: N. p., 2008. Web. doi:10.1063/1.2898955.
Hirai, M, Kumano, S, Department of Particle and Nuclear Studies, Graduate University for Advanced Studies 1-1, Ooho, Tsukuba, Ibaraki, 305-0801, & Nagai, T -H. Global NLO Analysis of Nuclear Parton Distribution Functions. United States. https://doi.org/10.1063/1.2898955
Hirai, M, Kumano, S, Department of Particle and Nuclear Studies, Graduate University for Advanced Studies 1-1, Ooho, Tsukuba, Ibaraki, 305-0801, and Nagai, T -H. 2008. "Global NLO Analysis of Nuclear Parton Distribution Functions". United States. https://doi.org/10.1063/1.2898955.
@article{osti_21055334,
title = {Global NLO Analysis of Nuclear Parton Distribution Functions},
author = {Hirai, M and Kumano, S and Department of Particle and Nuclear Studies, Graduate University for Advanced Studies 1-1, Ooho, Tsukuba, Ibaraki, 305-0801 and Nagai, T -H},
abstractNote = {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.},
doi = {10.1063/1.2898955},
url = {https://www.osti.gov/biblio/21055334}, journal = {AIP Conference Proceedings},
issn = {0094-243X},
number = 1,
volume = 981,
place = {United States},
year = {Thu Feb 21 00:00:00 EST 2008},
month = {Thu Feb 21 00:00:00 EST 2008}
}