Nucleon charge radius measurement with low-energy electron scattering

TL;DR

This paper discusses a new low-energy electron scattering experiment aimed at accurately measuring the proton and deuteron charge radii, addressing discrepancies from previous methods and contributing to fundamental physics research.

Contribution

It introduces a novel experimental approach for measuring nucleon charge radii using low-energy electron scattering at Tohoku University.

Findings

Current status of the experiment is presented.

Addresses inconsistencies in previous charge radius measurements.

Potential to improve precision in fundamental constants.

Abstract

The charge radius is one of the most basic characteristics of the nucleons. The proton charge radius is especially of great importance for many applications such as the structure studies of the atomic nuclei, the determination of the Rydberg constant and QED tests. Its determination is thus a hot topic in several physics communities due to inconsistent results using electron scattering, atomic and muonic hydrogen spectroscopy. A new measurement of the proton and deuteron charge radii with low energy electron scattering is being conducted in the Research Center for Accelerator and Radioisotope Science (RARiS), Tohoku University, Japan. The current status of the experiment is discussed in the present paper.