S. Taylor

Measurements of G(E)n / G(M)n from the H-2(polarized-e,e-prime polarized-n) reaction to Q**2 = 1.45 (GeV/c)**2

We report new measurements of the ratio of the electric form factor to the magnetic form factor of the neutron, G(n)(E)/G(n)(M), obtained via recoil polarimetry from the quasielastic 2H(e-->,e()n-->)1H reaction at Q2 values of 0.45, 1.13, and 1.45 (GeV/c)(2) with relative statistical uncertainties of 7.6% and 8.4% at the two higher Q2 points, which points have never been achieved in polarization measurements.

Measurements of the neutron electric to magnetic form-factor ratio G(En) / G(Mn) via the H-2(polarized-e, e-prime,polarized-n)H-1 reaction to Q**2 = 1.45-(GeV/c)**2

We report values for the neutron electric tomagnetic form factor ratio,G_(En)/G_(Mn), deduced frommeasurements nof the neutron’s recoil polarization in the quasielastic ^2H(e, en)^1H reaction, at three Q^2 values of 0.45, 1.13, nand 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 nG_(En) employing polarization degrees of freedom in the Q^2 > 1 (GeV/c)^2 region and stand as the most precise ndeterminations of G_(En) for all values of Q^2.

Measurements of the neutron electric to magnetic form factor ratio GEn/GMn via the 2H(e, e'n)1h reaction to Q2 = 1.45 (GeV/c)2

We report values for the neutron electric tomagnetic form factor ratio,G_(En)/G_(Mn), deduced frommeasurements nof the neutron’s recoil polarization in the quasielastic ^2H(e, en)^1H reaction, at three Q^2 values of 0.45, 1.13, nand 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 nG_(En) employing polarization degrees of freedom in the Q^2 > 1 (GeV/c)^2 region and stand as the most precise ndeterminations of G_(En) for all values of Q^2.

Measurement of the neutron electric form factor via recoil polarimetry

Abstract.The ratio Gen/Gmn of the electric to the magnetic form factor of the neutron has been measured by analyzing the polarization of the recoiling neutron in quasi-elastic scattering of longitudinally polarized electrons from deuterium at the Q2 values of 0.45, 1.15, and 1.47 (GeV/c)2. The experiment has been performed in Hall C of the Thomas Jefferson National Accelerator Facility. With Gmn being known Gen can be deduced. The preliminary results show that the lowest Q2 points follow the Galster parametrization and that the 1.47 (GeV/c)2 point rises above this parametrization.

The Electric Form Factor of the Neutron via Recoil Polarimetry to Q2 = 1.47 (GeV/c)2

The Jefferson Laboratory E93‐038 collaboration conducted measurements of the ratio of the electric form factor to the magnetic form factor of the neutron, GEn/GMn, via recoil polarimetry from the quasielastic 2H(e,e′n)1H reaction at three values of Q2 [viz., 0.45, 1.15, and 1.47 (GeV/c)2] in Hall C of the Thomas Jefferson National Accelerator Facility. The preliminary results for GEn at Q2 = 0.45 and 1.15 (GeV/c)2 are consistent with the Galster parameterization; however, the preliminary result for GEn at Q2 = 1.47 (GeV/c)2 lies slightly above the Galster parameterization.