Speaker
Description
The study of the nucleon structure and of its excited states
is a powerful tool in order to gain a better understanding
of the dynamics inside the nucleon and of the non-perturbative regime of QCD.
The different observables accessible using polarized photon
beams and/or polarized nucleon targets play an essential role
in this experimental research due to their enhanced sensitivity both to
the individual resonances and to the deformation of the nucleon ground
state caused by an incoming photon.
A systematic measurement of these observables is being carried
out by the A2@MAMI collaboration at the tagged photon facility
of the MAMI-Mainz accelerator and for energies ranging up to 1.5 GeV.
The large acceptance Crystal Ball/TAPS detection set-up is used for
this purpose.
The present talk will give an overview of the wide
range of observables measured so far on different reactions
together with a perspective on future experiments.
