Rho zero electroproduction and the hadronic contribution to deeply virtual compton scattering

A. Donnachie; J. Gravelis; G. Shaw

doi:doi:10.1007/s100520100545

EPJ

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2022 Impact factor 4.4

Particles and Fields

Eur. Phys. J. C 18, 539-545
DOI: 10.1007/s100520100545

Rho zero electroproduction and the hadronic contribution to deeply virtual compton scattering

A. Donnachie, J. Gravelis and G. Shaw

Department of Physics and Astronomy, University of Manchester, Manchester, M13 9PL, UK

ad@theory.ph.man.ac.uk
janis@theory.ph.man.ac.uk
graham.shaw@man.ac.uk

(Received: 21 September 2000 / Revised version: 1 November 2000 / Published online: 23 January 2001 -© Società Italiana di Fisica, Springer-Verlag 2001)

Abstract
A two-gluon-exchange model incorporating perturbative and non-perturbative effects is presented for $\rho^0$ electroproduction which provides an excellent description of all current data. This is then used to calculate the contribution from the $\rho^0$ to deeply virtual Compton scattering via the vector-meson-dominance transition $\rho^0 \to \gamma$ . This is found to be sufficiently large to provide a significant contribution through interference with the perturbative QCD term.