Improved constraints on exotic interactions between electron and proton in hydrogen

Lei Cong; Filip Ficek; Pavel Fadeev; Dmitry Budker

doi:10.1103/8nyk-sysy

paper

Improved constraints on exotic interactions between electron and proton in hydrogen

arXiv:2408.11009 · doi:10.1103/8nyk-sysy

Abstract

Atomic spectroscopy can be used to search for new bosons that carry exotic forces between elementary fermions. A comparison of a recent precise measurement [Bullis \textit{et al.}, Phys. Rev. Lett. \textbf{130}, 203001 (2023)] of the hyperfine splitting of the 2S $_{1/2}$ electronic levels of hydrogen and up-to-date bound-state quantum electrodynamics theory yields improved constraints on electron-proton exotic interactions of the dimensionless coupling strengths $g_{A} g_{A}$ , $g_{p} g_{p}$ , and $g_{V} g_{V}$ corresponding to the exchange of a axial-vector, pseudoscalar (axionlike) or vector boson, respectively.

3 pages, 3 figures