Measurements of DVCS and High |t| Vector Meson Production at HERA

Details Measurements of DVCS and High |t| Vector Meson Production at HERA Measurements of DVCS and High |t| Vector Meson Production at HERA

2003-06-29

arxiv.org/abs/hep-ex/0306058v1

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, 4 figures, Proceedings of Moriond 2003 Conf. on QCD and High Energy Interactions

Scientific paper

Measurements of Deeply Virtual Compton Scattering (DVCS) are presented using data collected by the H1 and ZEUS experiments at HERA. The transition from a virtual photon to an on-shell particle is expected to necessitate the use of skewed parton distributions for a theoretical description. The results are compared to theoretical predictions. Diffractive vector meson production measurements from H1 and ZEUS are also presented in which the magnitude of the four-momentum transfer squared |t| at the proton vertex is large. A large |t| is expected to make it possible to perform a perturbative calculation. The results are compared to recent theoretical predictions performed within the framework of perturbative QCD.

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