Eur. Phys. J. A (2018) 54: 3
https://doi.org/10.1140/epja/i2018-12453-2

Letter

Hyperfine splitting in ordinary and muonic hydrogen

Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg Universität, Mainz, Germany

^* e-mail: tomalak@uni-mainz.de

Received: 4 November 2017
Accepted: 5 January 2018
Published online: 22 January 2018

Abstract

We provide an accurate evaluation of the two-photon exchange correction to the hyperfine splitting of S energy levels in muonic hydrogen exploiting the corresponding measurements in electronic hydrogen. The proton structure uncertainty in the calculation of contribution is sizably reduced.