Speaker
Description
One of the most striking phenomenon of QCD is the formation of the nucleon out of massless gluons and almost massless quarks. This system of confined quarks and gluons serves as the basic constituent of ordinary baryonic matter and exhibits the characteristic spectra of excited states, which are sensitive to the details of quark confinement. Complementary to nucleon structure studies, nucleon excitations provide a unique opportunity to explore the many facets of non-perturbative QCD. The last few years have seen significant progress toward mapping out the nucleon spectrum. The rapidly growing database of high-quality experimental results on exclusive meson photo- and electroproduction off the nucleon from experimental facilities around the world allows us to determine the scattering amplitudes in the underlying reactions and to identify nucleon resonance contributions with minimal model dependence. The excited baryon program at Jefferson Lab now continues in the 12-GeV era with the successful data-taking of the GlueX experiment.
In this talk, I will review the experimental efforts in exploring and understanding the nucleon resonance spectrum at Jefferson Lab using the CEBAF Large Acceptance Spectrometer (CLAS) and at ELSA using the CBELSA/TAPS experimental setup. The discussion will also focus on the prospects for very-strange hyperon spectroscopy at Jefferson Lab.
