Nucleon Structure Functions at Moderate Q**2: Relativistic Constituent Quarks and Spectator Mass Spectrum

Abstract

We present a model description of the nucleon valence structure function applicable over the entire region of the Bjorken variable x, and above moderate values of Q**2 (> 1 GeV**2). We stress the importance of describing the complete spectrum of intermediate states which are spectator to the deep-inelastic collision. At a scale of 1 GeV**2 the relevant degrees of freedom are constituent quarks and pions. The large-x region is then described in terms of scattering from constituent quarks in the nucleon, while the dressing of constituent quarks by pions plays an important role at intermediate x values. The correct small-x behavior, which is necessary for the proper normalization of the valence distributions, is guaranteed by modeling the asymptotic spectator mass spectrum according to Regge phenomenology.

44 pages RevTeX, 9 uuencoded figures, accepted for publication in Nucl. Phys. A

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• Hadron Structure Functions in a Chiral Quark Model: Regularization, Scaling and Sum Rules
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• Polarized Parton Distributiions and Light-Front Dynamics
• Kaon quark distribution functions in the chiral constituent quark model
• Polarized Deep-Inelastic Scattering from Nuclei -- A Relativistic Approach
• Meson cloud effects on the pion quark distribution function in the chiral constituent quark model
• Resonant contributions to inclusive nucleon structure functions from exclusive meson electroproduction data
• Chiral-odd transversity spin structure function $h_1(x)$ of the nucleon in a constituent quark model
• Nucleon Structure Functions in the Three Flavor NJL Soliton Model
• Spin force dependence of the parton distributions: the ratio $F_2^n(x,Q^2)/F_2^p(x,Q^2)$
• Structure of the constituent quark and quark distributions of hadrons