New spin structure constraints on hyperfine splitting and proton Zemach radius
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 Δ pol . Data-driven evaluations of Δ pol have long been in significant tension with baryon chiral perturbation theory. Here we present improved results for Δ pol driven by new spin structure data, reducing the long-standing tension between theory and experiment and halving the dominating uncertainty in hyperfine splitting calculations.
Authors
- Vladimir Pascalutsa (ORCID: https://orcid.org/0000-0002-2613-6104)
- Sebastian Kühn (ORCID: https://orcid.org/0000-0003-2243-6836)
- D. Ruth
- Xiaochao Zheng (ORCID: https://orcid.org/0000-0001-7300-2929)
- K. Slifer (ORCID: https://orcid.org/0000-0002-6069-6287)
- Jianping Chen (ORCID: https://orcid.org/0000-0002-5505-4140)
- A. Deur (ORCID: https://orcid.org/0000-0002-2203-7723)
- Franziska Hagelstein (ORCID: https://orcid.org/0000-0002-2017-7132)
- C. Gu (ORCID: https://orcid.org/0000-0003-1009-6707)
- Carl E. Carlson (ORCID: https://orcid.org/0009-0002-4445-9852)
- Marco Ripani
- Ryan Zielinski
Institutions
- University of New Hampshire (US)
- William & Mary (US)
- Duke University (US)
- Johannes Gutenberg University Mainz (DE)
- Paul Scherrer Institute (CH)
- Thomas Jefferson National Accelerator Facility (US)
- Istituto Nazionale di Fisica Nucleare, Sezione di Genova (IT)
- University of Virginia (US)
- Old Dominion University (US)
Publication Details
- Journal
- Physics Letters B
- Published
- 2024-11-05
- DOI
- https://doi.org/10.1016/j.physletb.2024.139116
- Citations
- 9
- Primary Topic
- Atomic and Molecular Physics
- Type
- article
- Field-Weighted Citation Impact
- 3.04
Funders
- National Science Foundation
- U.S. Department of Energy
- Deutsche Forschungsgemeinschaft
- Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
- Office of Science
- Nuclear Physics