Speaker
Description
The study of baryonic excited states provides fundamental information on the internal structure of the nucleon and on the degrees of freedom that are relevant for QCD at low energies. N* are composite states and are sensitive to details about how quarks are confined. Meson photo-and electro-production reactions have provided complementary information on light quark baryon spectroscopy for several decades, but a crucial step forward has been the advent of large solid angle detectors, together with polarized beam and targets, which gave access to single and double polarization observables. The Q2 dependence of excited baryons electro-couplings has also been measured, gaining insight into the internal structure of baryons and providing a signature in the search for hybrid hadrons, in which gluons appear as constituent components beyond the valence quarks.
An overview of the experimental program dedicated to light flavor hadron spectroscopy will be reported. In particular topics relevant for Jlab, MAMI, ELSA, and for future prospects at the Electron Ion Collider (EIC) will be presented, such as the emergence of the mass of the nucleon, the search for exotic states and the properties of dense systems of gluons.
