Laser spectroscopy of muonic atoms has been recently used to probe properties of light
nuclei with unprecedented precision. We introduce nuclear effects in hydrogen-like atoms …

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 construct a relativistic chiral nucleon-nucleon interaction up to the next-to-next-to-
leading order in covariant baryon chiral perturbation theory. We show that a good …

We present a novel analysis of the π N scattering amplitude in covariant baryon chiral
perturbation theory up to O (p 3) within the extended-on-mass-shell renormalization scheme …

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 recent conundrum with the proton charge radius inspires reconsideration of the
corrections that enter into determinations of the proton size. We study the two-photon proton …

We present and apply a novel scheme for studying photon–and pion–nucleon scattering
beyond the threshold region. Partial-wave amplitudes for the γN and πN states are obtained …

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 …

The proton polarizability effect in the muonic-hydrogen Lamb shift comes out as a prediction
of baryon chiral perturbation theory at leading order and our calculation yields Δ E^(pol)(2P …

The ongoing experimental efforts to measure the hyperfine transition in muonic hydrogen
prompt an accurate evaluation of the proton-structure effects. At the leading order in α, which …