Quasielastic Scattering of Polarized Electrons from Polarized He3 and Measurement of the Neutron's Form Factors

A. K. Thompson, A. M. Bernstein, T. E. Chupp, D. J. Deangelis, G. E. Dodge, G. Dodson, K. A. Dow, M. Farkhondeh, W. Fong, J. Y. Kim, R. A. Loveman, J. M. Richardson, H. Schmieden, D. R. Tieger, T. C. Yates, M. E. Wagshul, J. D. Zumbro

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Abstract

We report measurements of asymmetries in quasielastic scattering of polarized electrons from polarized He3 at Q2=-0.2 GeV/c)2. We measure ATe=(-2.6+0.9+0.46)% and ATLe=(+1.75+1.2+0.31)%. The asymmetry ATe depends predominantly on the previously measured neutron magnetic form factor and provides a test of theories of spin-dependent quasielastic scattering. Our result for ATe is consistent with a previously reported measurement and suggests that the current theoretical picture is incomplete and final-state-interaction and meson-exchange corrections are necessary if the electric form factor of the neutron is to be reliably extracted from the asymmetry of ATLe.

Original languageEnglish (US)
Pages (from-to)2901-2904
Number of pages4
JournalPhysical Review Letters
Volume68
Issue number19
DOIs
Publication statusPublished - Jan 1 1992
Externally publishedYes

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Thompson, A. K., Bernstein, A. M., Chupp, T. E., Deangelis, D. J., Dodge, G. E., Dodson, G., ... Zumbro, J. D. (1992). Quasielastic Scattering of Polarized Electrons from Polarized He3 and Measurement of the Neutron's Form Factors. Physical Review Letters, 68(19), 2901-2904. https://doi.org/10.1103/PhysRevLett.68.2901