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Determination of two-photon exchange amplitudes from elastic electron-proton scattering data

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Abstract

Using the available cross-section and polarization data for elastic electron-proton scattering, we provide an extraction of the two-photon exchange amplitudes at a common value of four-momentum transfer, around Q 2 = 2.5 GeV^2. This analysis also predicts the e + p/e - p elastic-scattering cross-section ratio, which will be measured by forthcoming experiments.

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Authors and Affiliations

  1. Institut für Kernphysik, Johannes Gutenberg-Universität, D-55099, Mainz, Germany

    J. Guttmann, N. Kivel & M. Vanderhaeghen

  2. Helmholtz Institut Mainz, Johannes Gutenberg-Universität, D-55099, Mainz, Germany

    N. Kivel & M. Vanderhaeghen

  3. Petersburg Nuclear Physics Institute, 188350, St. Petersburg, Russia

    N. Kivel

  4. Physics Department, College of William and Mary, 23187, Williamsburg, VA, USA

    M. Meziane

Authors
  1. J. Guttmann
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  2. N. Kivel
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  3. M. Meziane
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  4. M. Vanderhaeghen
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Corresponding author

Correspondence to M. Vanderhaeghen.

Additional information

Communicated by M. Anselmino

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Guttmann, J., Kivel, N., Meziane, M. et al. Determination of two-photon exchange amplitudes from elastic electron-proton scattering data. Eur. Phys. J. A 47, 77 (2011). https://doi.org/10.1140/epja/i2011-11077-4

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  • DOI: https://doi.org/10.1140/epja/i2011-11077-4

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