Quark-hadron duality in electron scattering

Abstract

The duality between partonic and hadronic descriptions of physical phenomena is one of the most remarkable features of strong interaction physics. A classic example of this is in electron-nucleon scattering, in which low-energy cross sections, when averaged over appropriate energy intervals, are found to exhibit the scaling behavior expected from perturbative QCD. We present a comprehensive review of data on structure functions in the resonance region, from which the global and local aspects of duality are quantified, including its flavor, spin and nuclear medium dependence. To interpret the experimental findings, we discuss various theoretical approaches which have been developed to understand the microscopic origins of quark-hadron duality in QCD. Examples from other reactions are used to place duality in a broader context, and future experimental and theoretical challenges are identified.

198 pages, 80 figures, to appear in Physics Reports

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• Measurement of the Parity-Violating Asymmetry in Electron-Deuteron Scattering in the Nucleon Resonance Region
• Revealing Color Forces with Transverse Polarized Electron Scattering
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• Final-state interactions in inclusive deep-inelastic scattering from the deuteron
• Hadron mass corrections in semi-inclusive deep inelastic scattering
• Confirmation of quark-hadron duality in the neutron F_2 structure function
• Nuclear final-state interactions in deep inelastic scattering off the lightest nuclei
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• Unpolarized structure functions at Jefferson Lab
• QCD Evolution of Superfast Quarks
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• New Measurements of the EMC Effect in Few-Body Nuclei
• Moments and power corrections of longitudinal and transverse proton structure functions from lattice QCD
• Resonant contributions to polarized proton structure functions
• Duality in semi-inclusive pion electroproduction
• Quark model description of quasi-elastic pion knockout from the proton at JLAB
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• Ratios of 15N/12C and 4He/12C inclusive electroproduction cross sections in the nucleon resonance region
• PQCD Analysis of Parton-Hadron Duality
• Highlights and Perspectives of the JLab Spin Physics Program
• Quasielastic electron-deuteron scattering in the weak binding approximation
• Evaluation of the inclusive electron scattering observables in the resonance region from the experimental data
• Analysis of ${\alpha }_s$ from the realization of quark-hadron duality
• Collinear Factorization at sub-asymptotic kinematics and validation in a diquark spectator model
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