Nuclear parton distribution functions and their uncertainties

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dc.creatorHirai, M.
dc.creatorKumano, S.
dc.creatorNagai, T. -H.
dc.date2004-04-09
dc.date2004-07-15
dc.date.accessioned2026-07-07T11:31:35Z
dc.date.available2026-07-07T11:31:35Z
dc.descriptionWe analyze experimental data of nuclear structure-function ratios F_2^A/F_2^{A'} and Drell-Yan cross section ratios for obtaining optimum parton distribution functions (PDFs) in nuclei. Then, uncertainties of the nuclear PDFs are estimated by the Hessian method. Valence-quark distributions are determined by the F_2 data at large x; however, the small-x part is not obvious from the data. On the other hand, the antiquark distributions are determined well at x~0.01 from the F_2 data and at x~0.1 by the Drell-Yan data; however, the large-x behavior is not clear. Gluon distributions cannot be fixed by the present data and they have large uncertainties in the whole x region. Parametrization results are shown in comparison with the data. We provide a useful code for calculating nuclear PDFs at given x and Q^2.
dc.description9 pages, REVTeX, 23 eps files, Phys. Rev. C in press. Nuclear PDF library is available at http://hs.phys.saga-u.ac.jp/nuclp.html
dc.identifierhttps://arxiv.org/abs/hep-ph/0404093
dc.identifierhttp://arxiv.org/abs/hep-ph/0404093
dc.identifierPhys.Rev.C70:044905,2004
dc.identifierdoi:10.1103/PhysRevC.70.044905
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197316
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleNuclear parton distribution functions and their uncertainties
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