A unified presentation is given on the use of dispersion relations in the real and virtual
Compton scattering processes off the nucleon. The way in which dispersion relations for …

We review the current state of knowledge of the nucleon polarizabilities and of their role in
nucleon Compton scattering and in hydrogen spectrum. We discuss the basic concepts, the …

The parity and time-reversal invariant effective Lagrangian for a heavy fermion interacting
with an Abelian gauge field, ie, NRQED, is constructed through order 1/M 4. The …

The difference between the electromagnetic self-energies of proton and neutron can be
calculated with the Cottingham formula, which expresses the self-energies as an integral …

We present in detail a dispersion relation formalism for virtual Compton scattering (VCS) off
the proton from threshold into the Δ (1232)-resonance region. Such a formalism can be used …

We review various applications of dispersion relations (DRs) to the electromagnetic structure
of hadrons. We discuss the way DRs allow one to extract information about hadron structure …

We evaluate the two-photon exchange (TPE) correction to the unpolarized elastic electron-
proton scattering at small momentum transfer Q 2. We account for the inelastic intermediate …

We analyze the nucleon's Compton scattering amplitude in the Dyson-Schwinger/Faddeev
approach. We calculate a subset of diagrams that implements the nonperturbative handbag …

We derive two new sum rules for the unpolarized doubly virtual Compton scattering process
on a nucleon, which establish novel low-Q 2 relations involving the nucleon's generalized …

We calculate the nucleon resonance contributions to nucleon Compton scattering, including
all states with JP= 1/2±and JP= 3/2±where experimental data for their electromagnetic …