Weak Interaction Contribution to the Muonium Hyperfine Structure in the Standard Model
arXiv:2603.04026
Abstract
The contribution of the weak interaction to the hyperfine splitting of the ground state of muonium is investigated. The amplitudes of the one- and two-quantum exchange 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.
25 pages, 5 figures