Impact of hadronic and nuclear corrections on global analysis of spin-dependent parton distributions

Abstract

We present the first results of a new global next-to-leading order analysis of spin-dependent parton distribution functions from the most recent world data on inclusive polarized deep-inelastic scattering, focusing in particular on the large-x and low-Q^2 regions. By directly fitting polarization asymmetries we eliminate biases introduced by using polarized structure function data extracted under nonuniform assumptions for the unpolarized structure functions. For analysis of the large-x data we implement nuclear smearing corrections for deuterium and 3He nuclei, and systematically include target mass and higher twist corrections to the g_1 and g_2 structure functions at low Q^2. We also explore the effects of Q^2 and W^2 cuts in the data sets, and the potential impact of future data on the behavior of the spin-dependent parton distributions at intermediate and large x.

40 pages, 10 figures, 4 tables; version to appear in Phys. Rev. D

References in corpus (18)

• Extraction of Spin-Dependent Parton Densities and Their Uncertainties
• The Deuteron Spin-dependent Structure Function g1d and its First Moment
• Distribution Functions of the Nucleon and Pion in the Valence Region
• Spin Structure of the Nucleon - Status and Recent Results
• QCD Analysis of the Polarized World Data
• Determination of gluon polarization from deep inelastic scattering and collider data
• Extended Parameterisations for MSTW PDFs and their effect on Lepton Charge Asymmetry from W Decays
• Parton momentum and helicity distributions in the nucleon
• Effect of Orbital Angular Momentum on Valence-Quark Helicity Distributions
• Higher twist parton distributions from light-cone wave functions
• Proton Spin Structure in the Resonance Region
• Prospects for Charged Current Deep-Inelastic Scattering off Polarized Nucleons at a Future Electron-Ion Collider
• Target mass corrections for spin-dependent structure functions in collinear factorization
• Quark-Hadron Duality in Neutron (3He) Spin Structure
• Polarized Parton Distributions at an Electron-Ion Collider
• Comparative study of nuclear effects in polarized electron scattering from 3He
• Spin structure functions of 3He at finite Q^2
• Deuteron spin structure functions in the resonance and DIS regions

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