QCD analysis of polarized DIS and the SIDIS asymmetry world data and light sea-quark decomposition

Abstract

The results of our new QCD analysis of helicity parton distributions of the nucleon at full next-to-leading order (NLO) accuracy in the fixed-flavor number scheme will be presented. Performing a combined QCD fit on the global sets of latest inclusive and the semi-inclusive polarized deep inelastic scattering data, we are able to extract new polarized parton distribution functions (PPDFs) at the input scale $Q_0^2=1$ GeV${}^2$. Particulary, we have calculated PPDFs considering light sea-quark decomposition and the results are compared with the experimental data and the most precise theoretical models obtained by recent analyses. The latest COMPASS2010 SIDIS data, which were not available for the previous analyses, are employed in the current analysis and the effect of COMPASS SIDIS data is studied in detail. Also the uncertainties of PPDFs are determined using the standard Hessian technique.

18 pages, 12 figures, 5 tables

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Cited by in corpus (25)

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• Locally smeared operator product expansions in scalar field theory
• Lattice corrections to the quark quasidistribution at one-loop
• Next-to-next-to-leading order QCD analysis of spin-dependent parton distribution functions and their uncertainties: Jacobi polynomials approach
• Flavor decomposition of the nucleon unpolarized, helicity and transversity parton distribution functions from lattice QCD simulations
• Nucleon spin structure functions at NNLO in the presence of target mass corrections and higher twist effects
• First determination of $D^{\ast +}$-meson fragmentation functions and their uncertainties at next-to-next-to-leading order
• First global QCD analysis of charged hadron fragmentation functions and their uncertainties at next-to-next-to-leading order
• Small- and large-x nucleon spin structure from a global QCD analysis of polarized Parton Distribution Functions
• The impact of the intrinsic charm quark content of the proton on differential $\gamma +c$ cross section
• Target mass corrections and higher twist effects in polarized deep-inelastic scattering
• QCD analysis of structure functions in deep inelastic neutrino-nucleon scattering without using the orthogonal polynomials approach
• Impact of recent COMPASS data on polarized parton distributions and structure functions
• Sensitivity of strange quark polarization to flavor SU(3) symmetry breaking
• The uncertainty of parton distribution functions due to physical observables in a global analysis
• Quark-antiquark asymmetry of helicity distributions in the nucleon sea
• Small-x behavior of non-singlet spin structure function and Bjorken sum rule with pQCD correction up to NNLO and Higher twist correction
• Parton Distribution Functions properties of the statistical model
• Effect of symmetry breaking of polarized light sea quarks on the nucleon and nuclear structure functions, and sum rules
• Parton distribution functions and QCD coupling constant from LHC and non-LHC data
• Improved Method to extract Nucleon Helicity Distributions using Event Weighting
• AAK24: Global QCD analysis on polarized parton distribution in the presence of $A_2$ asymmetry measurements
• The effect of light sea quark symmetry breaking on polarized nucleus and sum rules
• QCD analysis of valence structure functions using deep inelastic lepton-nucleon scattering