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 …

Theoretical as well as experimental progress has been made in the last decade in
describing the properties of baryons. In this review I will mostly report on the theoretical …

We formulate a new power-counting scheme for a chiral effective-field theory of nucleons,
pions, and Δ s. This extends chiral perturbation theory into the Δ-resonance region. We …

Compton scattering from protons and neutrons provides important insight into the structure
of the nucleon. For photon energies up to about 300 MeV, the process can be parameterised …

We calculate the amplitude T 1 for forward doubly virtual Compton scattering in heavy-
baryon chiral perturbation theory, to fourth order in the chiral expansion and with the leading …

We analyse the proton Compton-scattering differential cross section for photon energies up
to 325 MeV using Chiral Effective Field Theory (χEFT) and extract new values for the electric …

We study low-energy nucleon Compton scattering in the framework of baryon chiral
perturbation theory (B χ PT) with pion, nucleon, and Δ (1232) degrees of freedom, up to and …

One of the central challenges of hadron physics in the regime of strong (non-perturbative)
QCD is to identify the relevant degrees of freedom of the nucleon and to quantitatively …

We analyze the low-energy spin structure of the nucleon in a covariant effective field theory
with explicit spin-3/2 degrees of freedom to third order in the small scale expansion. Using …

We discuss the extraction of the electromagnetic and spin polarizabilities of nucleons from
lattice QCD. We show that the external field method can be used to measure all the …