The proton charge radius extracted from the initial-state radiation experiment at MAMI
Name
10050_2021_Article_414.pdf
Size
830.43 KB
Format
Adobe PDF
Checksum (MD5)
c6ea71c43974505814845cb8fc33e348
Author(s)
Mihovilovič, M.
Achenbach, P.
Beranek, T.
Beričič, J.
Bernauer, J. C
Böhm, R.
Bosnar, D.
Cardinali, M.
Correa, L.
Debenjak, L.
Date Issued
March 29, 2021
Publisher
Springer Berlin Heidelberg
Citation
The European Physical Journal A. 2021 Mar 29;57(3):107
Version
Final published version
Abstract
Abstract
We report on a comprehensive reinterpretation of the existing cross-section data for elastic electron-proton scattering obtained by the initial-state radiation technique, resulting in a significantly improved accuracy of the extracted proton charge radius. By refining the external energy corrections we have achieved an outstanding description of the radiative tail, essential for a detailed investigation of the proton finite-size effects on the measured cross sections. This development, together with a novel framework for determining the radius, based on a regression analysis of the cross sections employing a polynomial model for the form factor, led us to a new value for the charge radius, which is
$$(0.878 \pm 0.011_\mathrm {stat.}\pm 0.031_\mathrm {sys.}\pm 0.002_\mathrm {mod.})\,\mathrm {fm}$$
(
0.878
±
0
.
011
stat
.
±
0
.
031
sys
.
±
0
.
002
mod
.
)
fm
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
Creative Commons Attribution
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1140/epja/s10050-021-00414-x
