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Published February 2006 | Published
Journal Article Open

Measurements of the neutron electric to magnetic form factor ratio G_(En)/G_(Mn) via the ^2H(e, e'n)^1H reaction to Q^2 = 1.45 (GeV/c)^2

Plaster, B.
Jefferson Lab E93-038 Collaborarion
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Abstract

We report values for the neutron electric tomagnetic form factor ratio,G_(En)/G_(Mn), deduced frommeasurements of the neutron's recoil polarization in the quasielastic ^2H(e, e'n)^1H reaction, at three Q^2 values of 0.45, 1.13, and 1.45 (GeV/c)^2. The data at Q^2 = 1.13 and 1.45 (GeV/c)^2 are the first direct experimental measurements of G_(En) employing polarization degrees of freedom in the Q^2 > 1 (GeV/c)^2 region and stand as the most precise determinations of G_(En) for all values of Q^2.

Additional Information

© 2006 The American Physical Society. Received 13 November 2005; published 27 February 2006. This work was supported in part by grants from the U.S. National Science Foundation, the U.S. Department of Energy, and the Deutsche Forschungsgemeinschaft. Two of us (R.M. and T.E.) acknowledge support during the planning phase of E93-038 from the Nuclear and High Energy Physics Center at Hampton University. The Southeastern Universities Research Association operates the Thomas Jefferson National Accelerator Facility under the U.S. Department of Energy contract no. DE-AC05-84ER40150. We thank the Jefferson Laboratory accelerator division staff for delivering the highquality polarized electron beam to our experiment. Finally, we thank the Jefferson Laboratory Hall C engineering and technical staff for their skillful assistance during our experiment.

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