![]() ![]() Electron scattering & atomic hydrogen data and radius extraction not as accurate. $0.8409 \pm 0.0004 fm$ determined from the Lamb shift in muonic hydrogen. Muonic and electronic measurements give different proton charge radii. Measurements of this energy interaction are typically done utilizing electron-proton scattering and/or hydrogen. Fresh Extraction of the Proton Charge Radius from Electron Scattering Phys Rev Lett. The final radius was determined by analysing the slopes of the measured cross-sections relative to the simulated ones. The red circles show the results of the ISR experiment. This value disagrees with the more precise value interaction at the charge surface boundary. The proton charge radius extracted from the electron scattering experiments. The electric charge radius of a proton, denoted by rEp, characterizes the spatial distribution of its Expand 1 PDF THE QUEST FOR THE PROTON CHARGE RADIUS I. In the high-$q$ data, the model dependence of the extrapolation is reduced andĭifferent parameterizations of the pre-2010 data yield a consistent value for Physics Universe 2023 A proton is a bound state of a strong interaction, governed by Quantum Chromodynamics (QCD). Knowledge about this large-$r$ density together with the information contained Nature - The gluonic gravitational form factor of the proton was determined using various models, and these analyses showed that the mass radius of the proton was smaller than the electric charge. As experimental data cannot reach that limit, numerous methods for making the extraction have been proposed. Parameterized $G(q)$ needed for the extrapolation. Background: Extracting the proton charge radius from electron scattering data requires determining the slope of the charge form factor at Q2 of zero. ![]() The problem lies in the model dependence of the In order to identify the sources of the discrepancies, and explore alternative Weĭiscuss the approaches used to analyze the e-p data, partly redo these analyses $G_e(q^2)$ extrapolated to momentum transfer $q^2$=0, shows a large scatter. This radius, traditionally determinedįrom elastic electron-proton scattering via the slope of the Sachs form factor Download a PDF of the paper titled Proton charge radius from electron scattering, by Ingo Sick Download PDF Abstract: The rms-radius $R$ of the proton charge distribution is a fundamental ![]()
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