Diffractive vector mesons beyond the s-channel helicity conservation

  • E. V. Kuraev
  • N. N. Nikolaev
  • B. G. Zakharov
Fields, Particles, and Nuclei

Abstract

We derive a full set, and determine the twist, of helicity amplitudes for diffractive production of light to heavy vector mesons in deep inelastic scattering. For large Q2 all helicity amplitudes but the double-flip are calculable in perturbative QCD and are proportional to the gluon structure function of the proton at a similar hardness scale. We find a substantial breaking of the s-channel helicity conservation, which must persist in real photoproduction also.

PACS numbers

13.60.Le 12.20.Ds 14.40.−n 

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Copyright information

© MAIK "Nauka/Interperiodica" 1998

Authors and Affiliations

  • E. V. Kuraev
    • 1
  • N. N. Nikolaev
    • 2
    • 3
  • B. G. Zakharov
    • 3
  1. 1.Laboratory for Theoretical PhysicsJINRDubna, Moscow RegionRussia
  2. 2.IKP(Theorie)KFA JülichJülichGermany
  3. 3.L. D. Landau Institute of Theoretical PhysicsRussian Academy of SciencesMoscowRussia

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