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Exclusive electroproduction of pion pairs

  • Regular Article - Hadron Physics
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Abstract.

We investigate electroproduction of pion pairs on the nucleon in the framework of QCD factorization for hard exclusive processes. We extend previous analyses by taking the hard-scattering coefficients at next-to-leading order in αs . The dynamics of the produced pion pair is described by two-pion distribution amplitudes, for which we perform a detailed theoretical and phenomenological analysis. In particular, we obtain constraints on these quantities by comparing our results with measurements of angular observables that are sensitive to the interference between two-pion production in the isoscalar and isovector channels.

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Authors and Affiliations

  1. Institut für Theoretische Physik, Universität Regensburg, 93040, Regensburg, Germany

    N. Warkentin & A. Schäfer

  2. Deutsches Elektronen-Synchrotron DESY, 22603, Hamburg, Germany

    M. Diehl

  3. Sobolev Institute of Mathematics, 630090, Novosibirsk, Russia

    D. Yu. Ivanov

Authors
  1. N. Warkentin
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  2. M. Diehl
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  3. D. Yu. Ivanov
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  4. A. Schäfer
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Xiangdong Ji

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Warkentin, N., Diehl, M., Ivanov, D.Y. et al. Exclusive electroproduction of pion pairs. Eur. Phys. J. A 32, 273–291 (2007). https://doi.org/10.1140/epja/i2007-10374-9

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  • DOI: https://doi.org/10.1140/epja/i2007-10374-9

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