Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)

Crawford, C. B.; Sindile, A.; Akdogan, T.; Alarcon, R.; Bertozzi, W.; Booth, E.; Botto, T.; Calarco, J.; Clasie, B.; DeGrush, A.; Donnelly, T. W.; Dow, K.; Dutta, D.; Farkhondeh, M.; Fatemi, R.; Filoti, O.; Franklin, W.; Gao, H.; Geis, E.; Gilad, S.; Haeberli, W.; Hasell, D.; Hersman, W.; Holtrop, M.; Karpius, P.; Kohl, M.; Kolster, H.; Lee, T.; Maschinot, A.; Matthews, J.; McIlhany, K.; Meitanis, N.; Milner, R. G.; Rapaport, J.; Redwine, R. P.; Seely, J.; Shinozaki, A.; Sirca, S.; Six, E.; Smith, T.; Tonguc, B.; Tschalaer, C.; Tsentalovich, E.; Turchinetz, W.; Brand, J. F. J. van den; van der Laan, J.; Wang, F.; Wise, T.; Xiao, Y.; Xu, W.; Zhang, C.; Zhou, Z.; Ziskin, V.; Zwart, T.

Measurement of the proton electric to magnetic form factor ratio from \vec ^1H(\vec e, e'p)

Authors

Description

We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was performed at the MIT-Bates South Hall Ring over a range of four-momentum transfer squared $Q^2$ from 0.15 to 0.65 (GeV/c)$^2$. Significantly improved results on the proton electric and magnetic form factors are obtained in combination with previous cross-section data on elastic electron-proton scattering in the same $Q^2$ region.
4 pages, 2 figures, submitted to PRL