Spectroscopy of Excited Baryon Resonances at Jefferson Lab

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 baryonicmatter 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 toexplore 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 allow us to determine the scattering amplitudes in the
underlying reactions and to identify nucleon resonance contributions with minimal
model dependence. In this talk, I will review the experimental program at Jefferson
Lab (JLab) in the 6-GeV era using the CEBAF Large Acceptance Spectrometer (CLAS)
and provide an overview of ourprogress in understanding the nucleon resonance
spectrum. The excited baryon program at JLab continues using the GlueX experiment.
I will discuss the prospects for very-strange hyperon spectroscopy in the 12-GeV era.