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Dispersion Representation of Deeply Virtual Compton Scattering

Author:
Pasquini   B.  


Journal:
Few-Body Systems


Issue Date:
2015


Abstract(summary):

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.


Page:
267-273


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