1. Measurement of the Neutron Electric Form FactorGenat0.67(GeV/c)2via3He→(e→,e′n)
- Author
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M. Mühlbauer, A. Liesenfeld, T. Großmann, S. Buttazzoni, T. Petitjean, M. Kohl, A. Ebbes, U. Müller, M. Ebert, M. O. Distler, Simon Širca, Th. Walcher, Klemen Bohinc, K. Merle, J. Bermuth, P. Merle, Daniela Rohe, Ingo Sick, N. Clawiter, A. Wagner, M. Hauger, E. W. Otten, I. Ewald, P. Jennewein, J.M. Friedrich, M. Kahrau, P. Bartsch, G. Kubon, K. W. Krygier, M. Zeier, M. Ding, J. Jourdan, R. Geiges, Jürgen Becker, T. Caprano, M. Potokar, R. Surkau, R. Böhm, M. Weis, H. Schmieden, R. Neuhausen, S. Derber, Harald Merkel, H. Wöhrle, Glen A. Warren, D. Baumann, G. Rosner, W. Heil, A. Klein, Th. Pospischil, A. Honegger, and A. Deninger
- Subjects
Physics ,Electron energy spectrum ,High pressure ,Electric form factor ,General Physics and Astronomy ,High Energy Physics::Experiment ,Neutron ,Atomic physics ,Nuclear Experiment ,Polarized target ,Spin-½ - Abstract
We have measured the neutron electric form factor ${G}_{\mathrm{en}}$ via ${}^{3}\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}}n)\mathrm{pp}$ at ${Q}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.67(\mathrm{GeV}/c{)}^{2}$ using the 3-spectrometer facility of the A1 Collaboration at the Mainz Microtron and a dedicated neutron detector. High pressure polarized ${}^{3}\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}$ gas was used as a target of polarized neutrons. ${G}_{\mathrm{en}}$ is determined from the ratio of the asymmetries ${A}_{\ensuremath{\perp}}{/A}_{\ensuremath{\parallel}}$ measured in quasifree kinematics with the target spin perpendicular and parallel to the momentum transfer. We find ${G}_{\mathrm{en}}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.052\ifmmode\pm\else\textpm\fi{}0.011\ifmmode\pm\else\textpm\fi{}0.005$.
- Published
- 1999
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