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Consistent treatment of color transparency effects in diffractive electroproduction of vector mesons off nuclei

  • Nuclei, Particles, and Their Interaction
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Abstract

Nuclear transparency for incoherent real and virtual photoproduction of vector mesons off nuclei depends crucially on the interplay of the initial-state and final-state interactions. We develop a consistent description of initial-state and final-state interactions based on the coupled-channel multiple-scattering theory. We present detailed predictions for incoherent production of ss̄ and cc̄ mesons. The onset of initial-state interactions is controlled by the production length l P, and we find strong variations of nuclear transparency when l P rises with energy and becomes comparable to the radius of the target nucleus R A. For ss̄ mesons, the regime l P∼R A corresponds to precisely the kinematic range of the HERA-HERMES experiment, whereas for cc̄ mesons the same condition will be met at the ENC electron-nucleus collider at GSI. In spite of the subasymptotic values of Q 2 and v, we find a complex pattern of color transparency-induced effects whose experimental study may provide information on several issues relevant to the understanding of QCD, both in the perturbative and nonperturbative regimes.

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Authors and Affiliations

  1. INFN Sezione Sanità, Physics Laboratory, Istituto Superiore di Sanità, Viale Regina Elena, 299, 1-00161, Roma, Italy

    O. Benhar

  2. Sezione di Trieste, Interdisciplinary Laboratory, SISSA, and INFN, Via Beirut, 4, I-34014, Trieste, Italy

    S. Fantoni

  3. Institut für Theoretische Kernphysik der Universität Bonn, Nussallee 14-16, D-53115, Bonn, Germany

    N. N. Nikolaev

  4. L. D. Landau Institute for Theoretical Physics, 117940, Moscow, Russia

    B. G. Zakharov

Authors
  1. O. Benhar
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  2. S. Fantoni
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  3. N. N. Nikolaev
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  4. B. G. Zakharov
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Additional information

Zh. Éksp. Teor. Fiz. 111, 769–786 (March 1997)

Published in English in the original Russian journal. Reproduced here with stylistic changes by the Translation Editor.

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Benhar, O., Fantoni, S., Nikolaev, N.N. et al. Consistent treatment of color transparency effects in diffractive electroproduction of vector mesons off nuclei. J. Exp. Theor. Phys. 84, 421–431 (1997). https://doi.org/10.1134/1.558158

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  • DOI: https://doi.org/10.1134/1.558158

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