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

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, $r_E=(0.839\pm 0.002{}_{-0.003}^{+0.002})$~fm and $r_M=(0.846\pm 0.001{}_{-0.005}^{+0.001})$~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.

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