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Electroproduction of J/ψ mesons within the semihard QCD approach and the color-singlet model

  • Elementary Particles and Fields
  • Theory
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Abstract

The deep-inelastic production of J/ψ mesons in electron-proton interactions at the HERA collider is considered within the semihard (k T-factorization) QCD approach and within the color-singlet model. The dependence of the Q 2, p 2T , z, y* and W distributions of J/ψ mesons on various sets of unintegrated gluon distributions and the dependence of the spin parameter α on p 2T and Q 2 are investigated. The results of the calculations are compared with the latest experimental data obtained by the H1 and ZEUS Collaborations at the HERA collider. It is shown that experimental investigations of the polarization properties of J/ψ mesons over the kinematical region Q 2<1 GeV2 may provide an additional test of the statement that the dynamics of gluon distributions is governed by the Balitsky-Fadin-Kuraev-Lipatov equations.

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Authors and Affiliations

  1. Institute of Nuclear Physics, Moscow State University, Vorob’evy gory, Moscow, 119899, Russia

    N. P. Zotov

  2. Moscow State University, Vorob’evy gory, Moscow, 119899, Russia

    A. V. Lipatov

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  1. N. P. Zotov
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  2. A. V. Lipatov
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__________

Translated from Yadernaya Fizika, Vol. 66, No. 9, 2003, pp. 1807–1819.

Original Russian Text Copyright © 2003 by Zotov, Lipatov.

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Zotov, N.P., Lipatov, A.V. Electroproduction of J/ψ mesons within the semihard QCD approach and the color-singlet model. Phys. Atom. Nuclei 66, 1760–1772 (2003). https://doi.org/10.1134/1.1611592

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  • DOI: https://doi.org/10.1134/1.1611592

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