High-density QCD and saturation of nuclear partons

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

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.

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References

  1. 1.
    N.N. Nikolaev, V.I. Zakharov, Sov. J. Nucl. Phys. 21, 227 (1975)Google Scholar
  2. 2.
    A.H. Mueller, Nucl. Phys. B 335, 115 (1990).CrossRefGoogle Scholar
  3. 3.
    L. McLerran, R. Venugopalan, Phys. Rev. D 49, 2233 (1994)CrossRefGoogle Scholar
  4. 4.
    I.P. Ivanov, N.N. Nikolaev, W. Schafer, B.G. Zakharov, V.R. Zoller, arXiv: hep-ph/0207045Google Scholar
  5. 5.
    N.N. Nikolaev, W. Schäfer, G. Schwiete, JETP Lett. 72 583 (2000)Google Scholar
  6. 6.
    N.N. Nikolaev, B.G. Zakharov, V.R. Zoller, Z. Phys. A 351, 435 (1995).Google Scholar
  7. 7.
    N.N. Nikolaev, B.G. Zakharov, Z. Phys. C 49, 607 (1991).Google Scholar
  8. 8.
    N.N. Nikolaev, B.G. Zakharov, Z. Phys. C 53, 331 (1992).Google Scholar
  9. 9.
    N.N. Nikolaev, B.G. Zakharov, J. Exp. Theor. Phys. 78, 806 (1994)Google Scholar
  10. 10.
    N.N. Nikolaev, B.G. Zakharov, V.R. Zoller, JETP Lett. 59, 6 (1994).Google Scholar
  11. 11.
    N.N. Nikolaev, B.G. Zakharov, Phys. Lett. B 332, 177 (1994).CrossRefGoogle Scholar
  12. 12.
    M. Genovese, N.N. Nikolaev, B.G. Zakharov, Phys. Lett. B 378, 347 (1996).CrossRefGoogle Scholar
  13. 13.
    A.H. Mueller, Nucl. Phys. B 558, 285 (1999)CrossRefGoogle Scholar
  14. 14.
    J. Nemchik, N.N. Nikolaev, B.G. Zakharov, Phys. Lett. B 341, 228 (1994).CrossRefGoogle Scholar

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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