70 citations · 437 across the 18 of their papers we have counts for
6 papers · 1 filter
Two-photon exchange on neutron and the hyperfine splitting
Oleksandr Tomalak
We calculate the contribution from the two-photon exchange on the neutron to the hyperfine splitting of S energy levels. We update the value of the neutron Zemach radius, estimate…
Electromagnetic proton-neutron mass difference
Oleksandr Tomalak
We discuss the Cottingham formula and evaluate the proton-neutron electromagnetic mass difference exploiting the state-of-the-art phenomenological input. We decompose individual co…
Intrinsic wavelet regression for surfaces of Hermitian positive definite matrices
Joris Chau, Rainer von Sachs
This paper develops intrinsic wavelet denoising methods for surfaces of Hermitian positive definite matrices, with in mind the application to nonparametric estimation of the time-v…
Two-photon exchange correction in elastic lepton-proton scattering
Oleksandr Tomalak
We present the dispersion relation approach based on unitarity and analyticity to evaluate the two-photon exchange contribution to elastic electron-proton scattering. The leading e…
Dispersion relation formalism for the two-photon exchange correction to elastic muon-proton scattering: elastic intermediate state
Oleksandr Tomalak, Marc Vanderhaeghen
We evaluate the two-photon exchange correction to the unpolarized cross section in the elastic muon-proton scattering within dispersion relations. One of the six independent invari…
Soft-photon corrections to the Bethe-Heitler process in the reaction
Matthias Heller, Oleksandr Tomalak, Marc Vanderhaeghen
We report on the calculation of first-order QED corrections for the process. An upcoming experiment at MAMI (Mainz) aims to compare the cross secti…