| Issue |
EPJ Web of Conferences
Volume 73, 2014
MENU 2013 – 13th International Conference Meson-Nucleon Physics and the Structure of the Nucleon
|
|
|---|---|---|
| Article Number | 02017 | |
| Number of page(s) | 4 | |
| Section | Nucleon Structure | |
| DOI | https://doi.org/10.1051/epjconf/20147302017 | |
| Published online | 09 June 2014 | |
https://doi.org/10.1051/epjconf/20147302017
Exclusive vector meson production at HERMES
INFN-University of Ferrara, via Saragat 1, 44122 Ferrara, Italy
a e-mail: aram.movsisyan@desy.de
Published online: 9 June 2014
Exclusive electroproduction of vector mesons has been measured on hydrogen and deuterium targets at HERMES using the 27.6 GeV electron/positron beam of HERA. From this process, more information can be obtained about 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 study of the azimuthal distribution of the decay products via spin-density matrix elements provide constraints on helicity-amplitudes used to describe exclusive vector-meson production. Recent results from the HERMES experiment on the production of rho, omega and phi mesons will be presented.
© Owned by the authors, published by EDP Sciences, 2014
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