Reanalysis of low-energy electron-proton scattering data and proton radius

Abstract

We reanalyze electron-proton scattering data in the momentum transfer region $Q^2<1Ge{V}^2$, which were used to determine proton electric radius, with main focus on the Mainz experiment (Bernauer et al., 2010). We examine dependence of fit results and ${\chi }^2$ on the cut-off in $Q^2$ and degree of fitting polynomial, using pseudo-data and compare it with the case of real experimental data. We find that under some assumptions, the data could be consistent with the radius, obtained from muonic hydrogen.

Comments: 6 pages, 4 figures