Quantum Chromodynamics, the theory of quarks and gluons, whose interactions can be
described by a local SU (3) gauge symmetry with charges called “color quantum numbers” …

About 120 baryons and baryon resonances are known, from the abundant nucleon with u
and d light-quark constituents up to the Ξ b−=(bsd), which contains one quark of each …

The CEBAF large acceptance spectrometer (CLAS) is used to study photo-and electro-
induced nuclear and hadronic reactions by providing efficient detection of neutral and …

The unitary isobar model MAID2007 has been developed to analyze the world data of pion
photo-and electroproduction. The model contains both a common background and several …

The composite nature of baryons manifests itself in the existence of a rich spectrum of
excited states, in particular in the important mass region 1–2 GeV for the light-flavoured …

We review recent progress in the investigation of the electroexcitation of nucleon
resonances, both in experiment and in theory. We describe current experimental facilities …

We present results on the electroexcitation of the low mass resonances Δ (1232) P 33, N
(1440) P 11, N (1520) D 13, and N (1535) S 11 in a wide range of Q 2. The results were …

We review the description of the lowest-energy nucleon excitation—the Δ (1232)-resonance.
Much of the recent experimental effort has been focused on the precision measurements of …

We develop a model for the weak pion production off the nucleon, which besides the delta
pole mechanism [weak excitation of the Δ (1232) resonance and its subsequent decay into …

In an exclusive measurement of the reaction γ d→ K+ K-pn, a narrow peak that can be
attributed to an exotic baryon with strangeness S=+ 1 is seen in the K+ n invariant mass …