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High-density QCD and saturation of nuclear partons

  • I. P. Ivanov
  • N. N. Nikolaev
  • W. Schäfer
  • B. G. Zakharov
  • V. R. Zoller
Article
  • 23 Downloads

Abstract.

We review the recent finding of the two-plateau momentum distribution of sea quarks in deep inelastic scattering off nuclei in the saturation regime. The diffractive plateau which dominates for small p measures precisely the momentum distribution of quarks in the beam photon, the rôle of the nucleus is simply to provide an opacity. The plateau for truly inelastic DIS exhibits a substantial nuclear broadening of the momentum distribution. Despite this nuclear broadening, the observed final-state and initial-state sea quark densities do coincide exactly. We emphasize how the saturated sea is generated from the nuclear-diluted Weizsäcker-Williams because of the anti-collinear splitting of gluons into sea quarks.

Keywords

Inelastic Scattering Momentum Distribution Deep Inelastic Scattering Beam Photon Saturation Regime 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  • I. P. Ivanov
    • 1
    • 2
  • N. N. Nikolaev
    • 1
    • 3
  • W. Schäfer
    • 4
  • B. G. Zakharov
    • 3
  • V. R. Zoller
    • 5
  1. 1.Institut f. KernphysikForschungszentrum JülichJülichGermany
  2. 2.Institute of MathematicsNovosibirskRussia
  3. 3.L.D. Landau Institute for Theoretical PhysicsChernogolovkaRussia
  4. 4.NORDITACopenhagen ØDenmark
  5. 5.Institute for Theoretical and Experimental PhysicsMoscowRussia

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