Determination of polarized parton distribution functions with recent data on polarization asymmetries

Simple item page
dc.creatorHirai, M.
dc.creatorKumano, S.
dc.creatorSaito, N.
dc.date2006-03-25
dc.date2006-06-28
dc.date.accessioned2026-07-07T10:44:55Z
dc.date.available2026-07-07T10:44:55Z
dc.descriptionGlobal analysis has been performed within the next-to-leading order in Quantum Chromodynamics (QCD) to determine polarized parton distributions with new experimental data in spin asymmetries. The new data set includes JLab, HERMES, and COMPASS measurements on spin asymmetry A_1 for the neutron and deuteron in lepton scattering. Our new analysis also utilizes the double-spin asymmetry for pi^0 production in polarized pp collisions, A_{LL}^{pi^0}, measured by the PHENIX collaboration. Because of these new data, uncertainties of the polarized PDFs are reduced. In particular, the JLab, HERMES, and COMPASS measurements are valuable for determining Delta d_v(x) at large x and Delta qbar(x) at x~0.1. The PHENIX pi^0 data significantly reduce the uncertainty of Delta g(x). Furthermore, we discuss a possible constraint on Delta g(x) at large x by using the HERMES data on g_1^d in comparison with the COMPASS ones at x~0.05.
dc.description11 pages, REVTeX, 13 eps files, Phys. Rev. D in press
dc.identifierhttps://arxiv.org/abs/hep-ph/0603213
dc.identifierhttp://arxiv.org/abs/hep-ph/0603213
dc.identifierPhys.Rev.D74:014015,2006
dc.identifierdoi:10.1103/PhysRevD.74.014015
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182761
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Experiment
dc.subjectNuclear Experiment
dc.subjectNuclear Theory
dc.titleDetermination of polarized parton distribution functions with recent data on polarization asymmetries
dc.typetext

Files

Collections

arXiv