Berlin 2005 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 8: Elektromagnetische und Hadronische Proben

HK 8.8: Talk

Friday, March 4, 2005, 18:15–18:30, TU MA001

First Measurements of DVCS off Nuclei — •Matthias Hoek — II. Physikalisches Institut, Universität Giessen, D-35392 Giessen

For the first time, a beam-spin azimuthal asymmetry has been measured in electroproduction of hard photons off nuclei. The asymmetry results from the interference between the Bethe-Heitler process and deeply virtual Compton scattering (DVCS), giving access to the latter at the amplitude level. The data have been obtained by the HERMES experiment at DESY, scattering the HERA 27.6 GeV positron beam off deuterium and neon gas targets.