Proton charge radius from a dispersive analysis of the latest space-like e-p scattering data

2022/02/17 by Yong-Hui Lin, Lin, Yong-Hui
Earth and Planetary Sciences · Physics and Astronomy · #FOS: Physical sciences #Geophysics and Gravity Measurements #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #Scientific Research and Discoveries #hep-ph

paper · pdf · doi:10.48550/arxiv.2202.08622

5 pages, 7figures, contribution to the proceedings of the 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman (HADRON2021)

arxiv created 2022/02/17 · openalex publication_date 2022/02/17 · arxiv updated 2022/02/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We present a dispersion theoretical analysis of recent date from electron-proton scattering. This allows for a high-precision extraction of the electric and magnetic radius of the proton, r_E = (0.839± 0.002^+0.002_-0.003)~fm and r_M = (0.846± 0.001^+0.001_-0.005)~fm, where the first error refers to the statistical type estimated from the bootstrap method, and the second one refers to the systematic uncertainty related to the underlying spectral functions.

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