# Proton radius reconstruction from simulated electron-proton elastic scattering cross sections at low transfer momenta

## TL;DR

This paper discusses a planned low-momentum transfer electron-proton scattering experiment at Mainz MAMI aiming to precisely measure the proton charge radius using an innovative detection method in a specific low Q^2 range.

## Contribution

It introduces a new experimental approach for measuring ep scattering cross sections at low Q^2 to improve proton radius determination.

## Key findings

- Simulation results support the feasibility of the experiment.
- Expected sub-percent precision in proton radius measurement.
- Potential to resolve existing proton radius discrepancies.

## Abstract

This note is motivated by preparations of a new $ep$ elastic scattering experiment in the low transfer momentum region to be carried out in the 720 MeV electron beam of the Mainz Microtron MAMI. This experiment will use an innovative method allowing for detection of recoil protons in coincidence with the scattered electrons. The goal is to measure the $ep$ differential cross sections in the $Q^2$ range from 0.001 GeV$^2$ to 0.04 GeV$^2$ and to determine the proton charge radius with sub-percent precision.