Polarized parton distributions from NLO QCD analysis of world DIS and SIDIS data

2009/08/31 by A. Sissakian, O. Shevchenko, O. Ivanov
Physics and Astronomy · #Hessian matrix #High-Energy Particle Collisions Research #Parametrization (atmospheric modeling) #Particle physics theoretical and experimental studies #Parton #Polarization (electrochemistry) #Quantum Chromodynamics and Particle Interactions #Quantum chromodynamics #hep-ph

paper · pdf · doi:10.1140/epjc/s10052-009-1216-7

published as Eur.Phys.J.C65:413-421,2010

arxiv created 2009/10/12 · openalex publication_date 2009/11/28 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

The combined analysis of polarized DIS and SIDIS data is performed in NLO QCD. The new parametrization on polarized PDFs is constructed. The uncertainties on PDFs and their first moments are estimated applying the modified Hessian method. The especial attention is paid to the impact of novel SIDIS data on the polarized distributions of light sea and strange quarks. In particular, the important question of polarized sea symmetry is studied in comparison with the latest results on this subject.

Citations

• NLO QCD method of the polarized semiinclusive DIS data analysis
• The spin-dependent two-loop splitting functions
• Can the polarization of the strange quarks in the proton be positive?
• Deep inelastic scattering of polarized electrons by polarizedHe<mml:mprescripts/>3and the study of the neutron spin structure
• Precision Measurement of the Neutron Spin AsymmetryA1nand Spin-Flavor Decomposition in the Valence Quark Region
• Uncertainties of predictions from parton distribution functions. II. The Hessian method