Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-07-31
Wold Scientific Books, Proc. of Transversity 08, Ferrara, Italy, 28 - 31 May 2008, p 104 (2008)
Physics
High Energy Physics
High Energy Physics - Experiment
8 pages, Proceedings of Transversity 2008, Ferrara, May 2008
Scientific paper
Generalized parton distributions (GPDs) provide a new and powerful framework for a complete description of the nucleon structure. They can provide a three-dimensional picture of how the quarks and gluons form a nucleon. GPDs can be probed experimentally in hard exclusive meson production or deeply virtual Compton scattering (DVCS). The COMPASS experiment at CERN is a unique place to study these reactions. At COMPASS, a high energy polarized positive or negative muon beam is scattered off a polarized or unpolarized fixed target. First results for exclusive rho^0 meson production are shown. The transverse target spin asymmetry for exclusively produced rho^0 on a transversely polarized deuteron target has been measured. Prospects for future measurements of DVCS and exclusive meson production at COMPASS will be shown. The experiment will use the existing COMPASS spectrometer with a new target, a new recoil detector and extended calorimetry. Simulations for different models and a test of the recoil detector have been performed.
for the COMPASS Collaboration
Schill Christian
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