Small x Behavior and Parton Saturation: A QCD Model

Oct 2, 1989
23 pages
Published in:
  • Nucl.Phys.B 335 (1990) 115-137
  • Published: 1990
Report number:
  • CU-TP-441a

Citations per year

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Abstract: (Elsevier)
A QCD model is defined to study questions of quark and gluon parton saturation at small x -values. The model uses a source consisting of a nucleus of heavy quarkonium bound states, states well understood in QCD. Deeply inelastic scattering, using the currents j(x) = − 1 4 F μν a F μν a and j μ (x) = ψ γ μ ψ , is evaluated in Born and one-loop approximation in order to extract quark and gluon distributions. Quark distributions are observed to saturate while gluon distributions have a saturating and a nonsaturating component.
  • lepton hadron: deep inelastic scattering
  • deep inelastic scattering: lepton hadron
  • quarkonium
  • quantum chromodynamics
  • quark: momentum spectrum
  • gluon: momentum spectrum
  • perturbation theory: higher-order
  • model: parton
  • Feynman graph