QCD analysis of valence structure functions using deep inelastic lepton-nucleon scattering

Abstract

A new ''$SK24$'' non-singlet QCD analysis of the structure functions at the NNLO approximation is performed, utilizing the global fit of the data from various charged lepton scattering experiments. We extract the valence parton distribution functions (PDFs) and provide a parametrization of them, along with the correlated errors for a wide range of $x$ and $Q^2$. We compare valence PDFs and their uncertainties with those from different PDF sets provided by various groups. We also obtain valence PDFs and the strong coupling constant ${\alpha }_s(M_Z^2)$, taking into account the nuclear correction concerning large $x$ as well as the target mass correction (TMC) and higher twist (HT) effects at the NNLO. In the large $x$ region, we extract the higher twist contributions of $x{F}_3(x,Q^2)$, $F_2^p(x,Q^2)$, and $F_2^d(x,Q^2)$. We determine ${\alpha }_s(M_Z^2)$ without and with considering the TMC and HT corrections and perform a comparison with the world average of ${\alpha }_s(M_Z^2)$ and other reported results. The extracted results concerning valence PDFs with their uncertainties and ${\alpha }_s(M_Z^2)$ value agree with available theoretical models.

26 pages, 15 figures, 4 tables

References in corpus (34)

• LHAPDF6: parton density access in the LHC precision era
• Parton distributions from LHC, HERA, Tevatron and fixed target data: MSHT20 PDFs
• The Path to Proton Structure at One-Percent Accuracy
• QCDNUM: Fast QCD Evolution and Convolution
• QCD Analysis of the Polarized World Data
• Covariant spectator theory of np scattering: Phase shifts obtained from precision fits to data below 350 MeV
• Evidence for intrinsic charm quarks in the proton
• Nuclear PDFs from neutrino deep inelastic scattering
• The three-loop unpolarized and polarized non-singlet anomalous dimensions from off shell operator matrix elements
• Fixed target Drell-Yan data and NNLO QCD fits of parton distribution functions
• The massless three-loop Wilson coefficients for the deep-inelastic structure functions $F_2,F_L,x{F}_3$ and $g_1$
• Three Loop Massive Operator Matrix Elements and Asymptotic Wilson Coefficients with Two Different Masses
• Higher Twist Contributions to the Structure Functions F_2^p(x,Q^2) and F_2^d(x,Q^2) at Large x and Higher Orders
• Unpolarized proton PDF at NNLO from lattice QCD with physical quark masses
• QCD analysis of nucleon structure functions in deep-inelastic neutrino-nucleon scattering: Laplace transform and Jacobi polynomials approach
• The Jacobi Polynomials QCD analysis for the polarized structure function
• Polarized Deeply Inelastic Scattering (DIS) Structure Functions for Nucleons and Nuclei
• Testing momentum dependence of the nonperturbative hadron structure in a global QCD analysis
• NNLO QCD contributions to the flavor non-singlet sector of ${\mathbf{F}}_2(\mathbf{x},{\mathbf{Q}}^2)$
• The N${}^3$LO Scheme-invariant QCD Evolution of the Non-singlet Structure Functions \boldmath $F_2^{\mathrm{NS}}(x,Q^2)$ and $g_1^{\mathrm{NS}}(x,Q^2)$
• Impact of Lattice Strangeness Asymmetry Data in the CTEQ-TEA Global Analysis
• Target mass corrections in lepton--nucleus DIS: theory and applications to nuclear PDFs
• Target mass corrections and higher twist effects in polarized deep-inelastic scattering
• The Role of Different Schemes in the QCD Analysis and Determination of the Strong Coupling
• A CT18 global PDF fit at the leading order in QCD
• Measurement of flavor asymmetry of light-quark sea in the proton with Drell-Yan dimuon production in $p+p$ and $p+d$ collisions at 120 GeV
• Parton distribution functions and constraints on the intrinsic charm content of the proton using BHPS approach
• QCD analysis of structure functions in deep inelastic neutrino-nucleon scattering without using the orthogonal polynomials approach
• Measurement of jet production in deep inelastic scattering and NNLO determination of the strong coupling at ZEUS
• Sensitivity of strange quark polarization to flavor SU(3) symmetry breaking
• New constraints on the up-quark valence distribution in the proton
• Recent data analysis to revisit the spin structure function of nucleon in Laplace space
• An analysis of polarized parton distribution functions with nonlinear QCD evolution equations
• Parton distribution functions and QCD coupling constant from LHC and non-LHC data