Measurement of Deeply Virtual Compton Scattering at HERA

Details Measurement of Deeply Virtual Compton Scattering at HERA Measurement of Deeply Virtual Compton Scattering at HERA

2005-05-18

arxiv.org/abs/hep-ex/0505061v1

Eur.Phys.J.C44:1-11,2005

Physics

High Energy Physics

High Energy Physics - Experiment

23 pages, 8 figures, 4 tables

Scientific paper

10.1140/epjc/s2005-02345-3

A measurement is presented of elastic deeply virtual Compton scattering \gamma* p \to \gamma p made using e^+ p collision data corresponding to a luminosity of 46.5 pb^{-1}, taken with the H1 detector at HERA. The cross section is measured as a function of the photon virtuality, Q^2, the invariant mass of the \gamma* p system, W, and for the first time, differentially in the squared momentum transfer at the proton vertex, t, in the kinematic range 2 < Q^2 < 80 GeV^2, 30 < W < 140 GeV and |t| < 1 GeV^2. QCD based calculations at next-to-leading order using generalized parton distributions can describe the data, as can colour dipole model predictions.

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