| Issue |
EPJ Web of Conferences
Volume 85, 2015
4th International Workshop on Transverse Polarisation Phenomena in Hard Processes (TRANSVERSITY 2014)
|
|
|---|---|---|
| Article Number | 02035 | |
| Number of page(s) | 6 | |
| Section | Research talks | |
| DOI | https://doi.org/10.1051/epjconf/20158502035 | |
| Published online | 23 January 2015 | |
https://doi.org/10.1051/epjconf/20158502035
Overview of HERMES Results on Exclusive Processes
INFN-University of Ferrara, Via Saragat 1, 44122 Ferrara, Italy
a e-mail: aram.movsisyan@desy.de
Published online: 23 January 2015
An overview of HERMES results on measurements of hard exclusive electroproduction of real photons and mesons on hydrogen and deuterium targets is presented. Experimental measurements of hard exclusive processes are commonly described within the formalism of generalized parton distributions (GPDs), which provide a unified description of the structure of hadrons embedding longitudinal-momentum distributions (ordinary PDFs) and transverse-position information (form factors). The HERMES experiment at DESY Hamburg studies hard exclusive processes using polarized electron or positron beams from HERA and internal gas targets. Information about GPDs is gained from the measurements of asymmetries that appear in the azimuthal distributions of produced mesons and photons, together with studies of the azimuthal distribution of the decay products via spin-density matrix elements.
© Owned by the authors, published by EDP Sciences, 2015
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