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Dispersion Representation of Deeply Virtual Compton Scattering

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Abstract

We discuss the dispersive representation of the D-term form factor for hard exclusive reactions, using unsubtracted t-channel dispersion relations. This representation provides a microscopical interpretation of the physical content of the D-term form factor in terms of t-channel exchanges with the appropriate quantum numbers. The contribution from two-pion intermediate states is explicitly evaluated, and the corresponding results for the D-term form factor as function of t as well as at t = 0 are discussed in comparison with available model predictions and phenomenological parametrizations.

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Authors and Affiliations

  1. Dipartimento di Fisica, Università degli Studi di Pavia, Pavia, Italy

    B. Pasquini

  2. Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, Pavia, Italy

    B. Pasquini

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  1. B. Pasquini
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Correspondence to B. Pasquini.

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Pasquini, B. Dispersion Representation of Deeply Virtual Compton Scattering. Few-Body Syst 56, 267–273 (2015). https://doi.org/10.1007/s00601-015-0954-3

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