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Genuine twist-3 contributions to the generalized parton distributionsfrom instantons

  • theoretical physics
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Abstract.

The genuine twist-3 quark-gluon (\(\bar{q} G q\)) contributions to the generalized parton distributions (GPDs) are estimated in the model of the instanton vacuum. These twist-3 effects are found to be parametrically suppressed relative to the “kinematical” twist-3 ones due to the small packing fraction of the instanton vacuum. We derived exact sum rules for the twist-3 GPDs.

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Authors and Affiliations

  1. Institut für Theoretische Physik II, Ruhr-Universität Bochum, 44780, Bochum, Germany

    D. V. Kiptily & M. V. Polyakov

  2. Petersburg Nuclear Physics Institute, 188350, Gatchina, St. Petersburg, Russia

    M. V. Polyakov

Authors
  1. D. V. Kiptily
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  2. M. V. Polyakov
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Received: 21 April 2004, Published online: 6 August 2004

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Kiptily, D.V., Polyakov, M.V. Genuine twist-3 contributions to the generalized parton distributionsfrom instantons. Eur. Phys. J. C 37, 105–114 (2004). https://doi.org/10.1140/epjc/s2004-01957-3

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  • DOI: https://doi.org/10.1140/epjc/s2004-01957-3

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