Weak-interaction contribution to the muonium hyperfine structure in the standard model
Phys. Rev. A 114, 032808 – Published 8 September, 2026
DOI: https://doi.org/10.1103/j9mt-d7c2
Abstract
The contribution of weak interaction to the hyperfine splitting of the ground state of muonium is investigated. The amplitudes of the one- and two-quantum exchanges determined by the Z and W bosons are calculated. One-loop corrections in the photon and Z-boson propagators and their contribution to the hyperfine structure of the spectrum are obtained on the basis of the dispersion method in quantum field theory.
