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Dispersion relation formalism for virtual Compton scattering off the proton

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Abstract:

We present in detail a dispersion relation formalism for virtual Compton scattering (VCS) off the proton from threshold into the Δ(1232)-resonance region. Such a formalism can be used as a tool to extract the generalized polarizabilities of the proton from both unpolarized and polarized VCS observables over a larger energy range. We present calculations for existing and forthcoming VCS experiments and demonstrate that the VCS observables in the energy region between pion production threshold and the Δ(1232)-resonance show an enhanced sensitivity to the generalized polarizabilities.

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Authors and Affiliations

  1. ECT*, I-38050 Villazzano, Trento, and INFN, Trento, Italy, , , , , , IT

    B. Pasquini

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

    M. Gorchtein, D. Drechsel & M. Vanderhaeghen

  3. Division of Physics and Astronomy, Faculty of Science, Vrije Universiteit, 1081 HV Amsterdam, The Netherlands, , , , , , NL

    A. Metz

Authors
  1. B. Pasquini
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  2. M. Gorchtein
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  3. D. Drechsel
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  4. A. Metz
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  5. M. Vanderhaeghen
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Received: 14 March 2001 / Accepted: 18 June 2001

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Pasquini, B., Gorchtein, M., Drechsel, D. et al. Dispersion relation formalism for virtual Compton scattering off the proton. Eur Phys J A 11, 185–208 (2001). https://doi.org/10.1007/s100500170084

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  • DOI: https://doi.org/10.1007/s100500170084

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