Parametrization of polarized parton distributions

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dc.creatorKumano, S.
dc.date2000-05-12
dc.date.accessioned2026-07-07T03:41:26Z
dc.date.available2026-07-07T03:41:26Z
dc.descriptionWe report the polarized parton distributions proposed by the Asymmetry Analysis Collaboration (AAC). Using parametrized distributions at Q^2=1 GeV^2 and measured A_1 data, we determine optimum polarized distributions in the leading order (LO) and next-to-leading order (NLO). We find that the polarized antiquark distribution is not well determined particularly at small x. It could lead to a rather small quark spin content in comparison with usually-quoted values of 10-30%. In our analysis, it varies from 5% to 28% depending on the small-x extrapolation. It is necessary to have small-x (<10^{-3}) data for precise determination. In addition, the large-x region should be also studied for Δq-bar, which cannot be determined solely by g_1. We propose three sets of distributions as the longitudinally polarized parton distribution functions.
dc.description5 pages LATEX, moriond.sty, amsmath.sty, epsfig.sty, wrapfig.sty, 6 eps figures. Talk at the XXXVth Rencontres de Moriond "QCD and High Energy Hadronic Interactions", Les Arcs, France, March 18-25, 2000, to be published in proceedings. Complete postscript file and conference transparencies are available at http://www-hs.phys.saga-u.ac.jp Email: kumanos@cc.saga-u.ac.jp
dc.identifierhttps://arxiv.org/abs/hep-ph/0005117
dc.identifierhttp://arxiv.org/abs/hep-ph/0005117
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/39585
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Theory
dc.titleParametrization of polarized parton distributions
dc.typetext

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