Bochum 2009 – wissenschaftliches Programm

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HK: Fachverband Hadronen und Kerne

HK 5: Hadron Structure and Spectroscopy II

HK 5.5: Vortrag

Montag, 16. März 2009, 15:30–15:45, H-ZO 30

Deeply Virtual Compton Scattering on unpolarized hydrogen and deuterium targets at the HERMES experiment — •Dietmar Zeiler — Friedrich-Alexander-Universität Erlangen, Germany

In this presentation preliminary results on azimuthal asymmetries in leptoproduction of real photons on both unpolarized hydrogen and deuterium targets measured at the HERMES experiment will be discussed. The analysis includes the extraction of asymmetries originating from the interference of Deeply Virtual Compton Scattering (DVCS) and Bethe-Heitler amplitudes by simultaneously fitting data taken with different beam charges and helicities. Sizeable asymmetry amplitudes for the main moments of the beam-charge asymmetry and the beam-spin asymmetry for both targets have been found. The moments related to the squared DVCS amplitude are compatible with zero. All results have been compared to model calculations.

This project is funded by the BMBF, project no 06 ER 143.