Measurement of Deeply Virtual Compton Scattering at HERA
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- Wunsch, E.
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- Yan, W.
- Yeganov, V.
- Zacek, J.
- Zalesak, J.
- Zhang, Zhiqing
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- Zimmermann, J.
- Zimmermann, T.
- Zohrabyan, H.
- Zomer, F.
Publication date
January 2005
DOI Publisher
Springer Science and Business Media LLCAbstract
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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