Work

Fresh Extraction of the Proton Charge Radius from Electron Scattering

Year: 2021

Type: article

Abstract: We present a novel method for extracting the proton radius from elastic electron-proton (ep) scattering data. The approach is based on interpolation via continued fractions augmented by statistical sampling and avoids any assumptions on the form of function used for the representation of data and subsequent extrapolation onto Q^{2}≃0. Applying the method to extant modern ep datasets, we find that all results are mutually consistent and, combining them, we arrive at r_{p}=0.847(8) fm. This result compares favorably with values obtained from contemporary measurements of the Lamb shift in muonic hydrogen, transitions in electronic hydrogen, and muonic deuterium spectroscopy.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.127.092001

Authors: Zhu-Fang Cui, Daniele Binosi, Craig D. Roberts, Sebastian M. Schmidt

Institutions: Nanjing University, European Centre for Theoretical Studies in Nuclear Physics and Related Areas, Helmholtz-Zentrum Dresden-Rossendorf, RWTH Aachen University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,750

Funders: National Natural Science Foundation of China, Government of Jiangsu Province, Natural Science Foundation of Jiangsu Province, Nanjing University