paper

First measurement of proton's charge form factor at very low $Q^{2}$ with initial state radiation

arXiv:1612.06707 · doi:10.1016/j.physletb.2017.05.031

Abstract

We report on a new experimental method based on initial-state radiation (ISR) in e-p scattering, in which the radiative tail of the elastic e-p peak contains information on the proton charge form factor ( $G_{E}^{p}$ ) at extremely small $Q^{2}$ . The ISR technique was validated in a dedicated experiment using the spectrometers of the A1-Collaboration at the Mainz Microtron (MAMI). This provided first measurements of $G_{E}^{p}$ for $0.001 \leq Q^{2} \leq 0.004 (G e V / c)^{2}$ .

6 pages, 3 figures

First measurement of proton's charge form factor at very low Q2 with initial state radiation

Abstract

First measurement of proton's charge form factor at very low $Q^{2}$ with initial state radiation