# 19th International Conference on Hadron Spectroscopy and Structure in memoriam Simon Eidelman

26-31 July 2021
Mexico City
Mexico/General timezone
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Mexico City -
Invited Plenary

# High-precision determination of the electric and magnetic radius of the proton

## Speakers

• Dr. Yonghui LIN

## Abstract

Using dispersion theory with an improved description of the two-pion continuum based on the precise Roy-Steiner analysis of pion-nucleon scattering, we analyze recent data from electron-proton scattering. This allows for a high-precision determination of the electric and magnetic radius of the proton, $r_E = (0.838^{+0.005}{-0.004}{}^{+0.004}{-0.003})$~fm and $r_M = (0.847\pm{0.004}\pm{0.004})$~fm.