Pion structure function from leading neutron electroproduction and SU(2) flavor asymmetry

Abstract

We examine the efficacy of pion exchange models to simultaneously describe leading neutron electroproduction at HERA and the $\bar{d}-\bar{u}$ flavor asymmetry in the proton. A detailed ${\chi }^2$ analysis of the ZEUS and H1 cross sections, when combined with constraints on the pion flux from Drell-Yan data, allows regions of applicability of one-pion exchange to be delineated. The analysis disfavors several models of the pion flux used in the literature, and yields an improved extraction of the pion structure function and its uncertainties at parton momentum fractions in the pion of $4\times 10^{-4}\lesssim x_{\pi }\lesssim 0.05$ at a scale of $Q^2$=10 GeV${}^2$. Based on the fit results, we provide estimates for leading proton structure functions in upcoming tagged deep-inelastic scattering experiments at Jefferson Lab on the deuteron with forward protons.

arXiv comment41 pages, 13 figures

References in corpus (42)

• Improved Measurement of the $\bar{d}/\bar{u}$ Asymmetry in the Nucleon Sea
• Phenomenology of Forward Hadrons in DIS: Fracture Functions and its $Q^2$ Evolution
• Flavor Asymmetry of Antiquark Distributions in the Nucleon
• Soft-Gluon Resummation and the Valence Parton Distribution Function of the Pion
• Distribution Functions of the Nucleon and Pion in the Valence Region
• The nucleon-nucleon interaction
• Flavour and Spin of the Proton and the Meson Cloud
• Chiral extrapolation of lattice moments of proton quark distributions
• SU(3) Baryon Chiral Perturbation Theory and Long Distance Regularization
• The pion parton distribution function in the valence region
• Flavor Asymmetry of Light Quarks in the Nucleon Sea
• Progress in the Determination of the Partonic Structure of the Proton
• Deep Inelastic Scattering from off-Shell Nucleons
• Leading neutron production in $e^{+}p$ collisions at HERA
• Measurement of Leading Neutron Production in Deep-Inelastic Scattering at HERA
• Chiral Corrections to Matrix Elements of Twist-2 Operators
• Dynamics of Light Antiquarks in the Proton
• Pion Structure Function in the Nambu and Jona-Lasinio model
• Dynamical Symmetry Breaking in the Sea of the Nucleon
• Is the Sullivan Process Compatible with QCD Chiral Dynamics?
• Chiral Perturbation Theory and the first moments of the Generalized Parton Distriputions in a Nucleon
• Measurement of the structure function of the nearly free neutron using spectator tagging in inelastic ${}^2$H(e, e'p)X scattering with CLAS
• Parton momentum and helicity distributions in the nucleon
• Measurement of the neutron F2 structure function via spectator tagging with CLAS
• Leading Quenching Effects in the Proton Magnetic Moment
• Constructing Parton Convolution in Effective Field Theory
• Mesonic Parton Densities Derived From Constituent Quark Model Constraints
• Role of Vector Mesons in High-Q^2 Lepton-Nucleon Scattering
• $\bar{d}-\bar{u}$ asymmetry in the proton in chiral effective theory
• Pion momentum distributions in the nucleon in chiral effective theory
• Leading neutron energy and pT distributions in deep inelastic scattering and photoproduction at HERA
• Generalized Relativistic Meson Wave Function
• Quark-hadron duality in electron-pion scattering
• Pion structure function at small x from DIS data
• Anatomy of relativistic pion loop corrections to the electromagnetic nucleon coupling
• Broken Chiral Symmetry on a Null Plane
• Photoproduction with a Leading Proton at HERA
• Gluon saturation and Feynman scaling in leading neutron production
• Light-front representation of chiral dynamics in peripheral transverse densities
• Skyrme-Model $\pi NN$ Form Factor and Nucleon-Nucleon Interaction
• Higher twists in the pion structure function
• The Skyrme Model piNN Form Factor and the Sea Quark Distribution of the Nucleon

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• Reflections upon the Emergence of Hadronic Mass
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• Complementarity of experimental and lattice QCD data on pion parton distributions
• Tomography of pions and protons via transverse momentum dependent distributions
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• Parton distributions from nonlocal chiral SU(3) effective theory: Flavor asymmetries
• Mellin moments of spin dependent and independent PDFs of the pion and rho meson
• Determination of neutron fracture functions from a global QCD analysis of leading neutron production at HERA
• A Bayesian analysis of light-front models and the nucleon's charmed sigma term
• Nucleon form factors and parton distributions in nonlocal chiral effective theory
• Fixed-target charmonium production and pion parton distributions
• Pions in Proton Structure and Everywhere Else
• Leading neutron production at the EIC and LHeC: estimating the impact of the absorptive corrections
• Investigating saturation effects and the virtual pion in leading neutron events at HERA with the dipole model
• Flavor symmetry breaking in the $\Delta$ sea
• Global QCD Analysis of Pion Parton Distributions with Threshold Resummation
• Feasibility Study of Pion and Kaon Structure via the Sullivan Process at EicC
• Pion PDFs confronted by Fixed-Target Charmonium Production
• Bayesian Monte Carlo extraction of sea asymmetry with SeaQuest and STAR data
• An analysis of parton distributions in a pion with Bézier parametrizations
• Summary of Structure Functions and PDFs Working Group
• Chiral Corrections to Baryon Electromagnetic Form Factors
• Global analysis on determination of fracture functions considering sea quark asymmetries in the nucleon