Proton structure in the hyperfine splitting of muonic hydrogen

TL;DR

This paper predicts the proton polarizability's effect on muonic hydrogen's hyperfine splitting using baryon chiral perturbation theory and compares it with dispersive calculation results.

Contribution

It provides the first leading-order baryon chiral perturbation theory prediction for proton polarizability in muonic hydrogen hyperfine splitting.

Findings

Chiral perturbation theory results align with dispersive calculations.

Quantifies proton polarizability impact on hyperfine splitting.

Offers insights into proton structure effects in muonic atoms.

Abstract

We present the leading-order prediction of baryon chiral perturbation theory for the proton polarizability contribution to the 2S hyperfine splitting in muonic hydrogen, and compare with the results of dispersive calculations.