The COMPASS Collaboration is currently preparing a proposal for future studies of nucleon structure beyond 2011. A major focus of this programme will be the investigation of the transverse spatial structure of the nucleon ('nucleon tomography') as described by 'generalized parton distributions' (GPDs).
The unique high-energy, highly polarized CERN muon beam together with the COMPASS spectrometer give access to the intermediate region between the gluon-dominated small-x_Bjorken region measured at HERA and the valence-quark-dominated large-x_Bjorken region accessed at HERMES and JLAB. COMPASS will study this transition region using Deeply Virtual Compton Scattering off unpolarized and polarized targets.
The workshop "GPDs@COMPASS" will be held at CERN bringing together theoreticians and experimentalists. Its main purpose is to better define the key measurements for studies of GPDs.
Nicole d'Hose (CEA Saclay)
Horst Fischer (ALU Freiburg)
Alain Magnon (CEA Saclay)
Gerhard Mallot (CERN)
Wolf-Dieter Nowak (CERN)