The running BFKL: Resolution of Caldwell’s puzzle

  • N. N. Nikolaev
  • V. R. Zoller
Fields, Particles, and Nuclei

Abstract

The HERA data on the proton structure function F2(x,Q2) at very small x and Q2 show a dramatic departure of the logarithmic slope ∂F2/∂log Q2 from theoretical predictions based on the DGLAP evolution. We show that the running BFKL approach provides a quantitative explanation for the observed x and/or Q2 dependence of ∂F2/∂log Q2.

PACS numbers

14.20.Dh 

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References

  1. 1.
    A. Caldwell, DESY Theory Workshop, DESY, October 1997.Google Scholar
  2. 2.
    ZEUS Collaboration, J. Breitweg et al., Report # DESY-98-162.Google Scholar
  3. 3.
    V. N. Gribov and L. N. Lipatov, Sov. J. Nucl. Phys. 15, 438 (1972); G. Altarelli and G. Parisi, Nucl. Phys. B 126, 298 (1977); Yu. L. Dokshitzer, Sov. Phys. JETP 46, 641 (1977).Google Scholar
  4. 4.
    M. Gluck, E. Reya, and A. Vogt, Z. Phys. C 67, 433 (1995).Google Scholar
  5. 5.
    A. D. Martin, R. G. Roberts, W. J. Stirling, and R. S. Thorne, Report # DTP-98-10; RAL-TR-98-029.Google Scholar
  6. 6.
    V. R. Zoller, in Proceedings of the 6th International Workshop on DIS and QCD (DIS 98), Brussels, 1998; Report # FZ-IKP(TH)-1998-5.Google Scholar
  7. 7.
    E. A. Kuraev, L. N. Lipatov and V. S. Fadin, Sov. Phys. JETP 44, 443 (1976); 45, 199 (1977); Ya. Ya. Balitskii and L. N. Lipatov, Sov. J. Nucl. Phys. 28, 822 (1978).Google Scholar
  8. 8.
    N. N. Nikolaev, B. G. Zakharov, and V. R. Zoller, JETP Lett. 59, 8 (1994).ADSGoogle Scholar
  9. 9.
    N. N. Nikolaev, B. G. Zakharov, and V. R. Zoller, JETP 78, 806 (1994).ADSGoogle Scholar
  10. 10.
    E. Meggiolaro, Report # HD-THEP-98-34.Google Scholar
  11. 11.
    V. R. Zoller, in Proceedings of the 5th International Workshop on DIS and QCD (DIS 97), Chicago, Ill., 1997.Google Scholar
  12. 12.
    N. N. Nikolaev, B. G. Zakharov, and V. R. Zoller, JETP Lett. 66, 138 (1997).CrossRefADSGoogle Scholar
  13. 13.
    L. N. Lipatov, Sov. Phys. JETP 63, 904 (1986).Google Scholar
  14. 14.
    N. N. Nikolaev and B. G. Zakharov, Z. Phys. C 49, 697 (1991).CrossRefGoogle Scholar
  15. 15.
    N. N. Nikolaev and B. G. Zakharov, Phys. Lett. B 333, 250 (1994).ADSGoogle Scholar
  16. 16.
    N. N. Nikolaev and B. G. Zakharov, Phys. Lett. B 327, 157 (1994).ADSGoogle Scholar
  17. 17.
    N. N. Nikolaev and B. G. Zakharov, Phys. Lett. B 327, 149 (1994).ADSGoogle Scholar
  18. 18.
    A. Donnachie and P. V. Landshoff, Phys. Lett. B 437, 408 (1998).ADSGoogle Scholar
  19. 19.
    K. Golec-Biernat and M. Wusthoff, Report # DTP-98-50.Google Scholar
  20. 20.
    P. V. Landshoff and O. Nachtmann, Z. Phys. C 35, 405 (1987).CrossRefGoogle Scholar
  21. 21.
    H. G. Dosch, T. Gousset, G. Kulzinger et al., Phys. Rev. D 55, 602 (1997).CrossRefGoogle Scholar
  22. 22.
    J. Nemchik, N. N. Nikolaev, E. Predazzi et al., JETP 86, 1054 (1998).CrossRefADSGoogle Scholar

Copyright information

© MAIK "Nauka/Interperiodica" 1999

Authors and Affiliations

  • N. N. Nikolaev
    • 1
  • V. R. Zoller
    • 2
  1. 1.Institut für KernphysikForschungszentrum JülichJülichGermany
  2. 2.Institute of Theoretical and Experimental PhysicsMoscowRussia

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