DVCS via color dipoles: Nonperturbative effects
arXiv:0812.3992 · doi:10.1103/PhysRevD.79.034019
Abstract
We study the DVCS amplitude within the color dipole approach. The light-cone wave function of a real photon is evaluated in the instanton vacuum model. Our parameter free calculations are able to describe H1 data, both the absolute values and the -dependences, at medium-high values of . The dependence is found to be sensitive to the choice of the phenomenological cross section fitted to DIS data.
11 pages; references added, bibliographic inaccuracy corrected
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