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Nucleon Polarizabilities: from Compton Scattering to Hydrogen Atom
Franziska Hagelstein, Rory Miskimen, Vladimir Pascalutsa
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, th…
Proton structure in the hyperfine splitting of muonic hydrogen
Franziska Hagelstein, Vladimir Pascalutsa
We present the leading-order prediction of baryon chiral perturbation theory for the proton polarizability contribution to the 2S hyperfine splitting in muonic hydrogen, and compar…
Evaluation of the forward Compton scattering off protons: I. Spin-independent amplitude
Oleksii Gryniuk, Franziska Hagelstein, Vladimir Pascalutsa
We evaluate the forward Compton scattering off the proton, based on Kramers-Kronig kind of relations which express the Compton amplitudes in terms of integrals of total photoabsorp…
Breakdown of the expansion of finite-size corrections to the hydrogen Lamb shift in moments of charge distribution
Franziska Hagelstein, Vladimir Pascalutsa
We quantify a limitation in the usual accounting of the finite-size effects, where the leading and subleading contributions to the Lamb shift are given by the…