Document Type

Article

Publication Date

2024

DOI

10.1016/j.physletb.2024.139116

Publication Title

Physics Letters B

Volume

859

Pages

139116 (1-7)

Abstract

The 1S hyperfine splitting in hydrogen is measured to an impressive ppt precision and will soon be measured to ppm precision in muonic hydrogen. The latter measurement will rely on theoretical predictions, which are limited by knowledge of the proton polarizability effect Δpol. Data-driven evaluations of Δpol have long been in significant tension with baryon chiral perturbation theory. Here we present improved results for Δpol driven by new spin structure data, reducing the long-standing tension between theory and experiment and halving the dominating uncertainty in hyperfine splitting calculations.

Rights

© 2024 The Authors

This is an open access article under the Creative Commons Attribution 4.0 International (CC BY 4.0) License.

Data Availability

Article states: "Data will be made available on request."

Original Publication Citation

Ruth, D., Slifer, K., Chen, J. P., Carlson, C. E., Hagelstein, F., Pascalutsa, V., Deur, A., Kuhn, S., Ripani, M., Zheng, X. C., Zielinskia, R., & Gu, C. (2024). New spin structure constraints on hyperfine splitting and proton Zemach radius. Physics Letters B, 859, 1-7, Article 139116. https://doi.org/10.1016/j.physletb.2024.139116

ORCID

0000-0003-2243-6836 (Kuhn)

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