Dispersion relations and QCD factorization in hard reactions
arXiv:0710.4211
Abstract
We study analytical properties of the hard exclusive process amplitudes. We found that QCD factorization for deeply virtual Compton scattering and hard exclusive vector meson production results in the subtracted dispersion relation with the subtraction constant determined by the Polyakov-Weiss -term.
Talk given at International Conference ``Hadron Structure'07'', Modra-Harmonia, Slovakia