Absolute differential cross sections for the threshold electrodisintegration of the deuteron with good resolution were measured at a laboratory scattering angle of 160°for five values of Q 2 ranging from 8.66 to 42.4 fm Ϫ2 . Comparisons of the data averaged over E np from 0 to 3 MeV and from 0 to10 MeV are made with nonrelativistic meson exchange calculations. These calculations are sensitive to the nucleon electromagnetic form factors, nucleon-nucleon potential, and relativistic effects. The data are also compared with a hybrid quark-hadron model calculation that describes the deuteron as a six-quark cluster for the short range part of the interaction. Some of these calculations can describe the data reasonably well over certain ranges of Q 2 ; however, none of these calculations can accurately describe the data over the entire measured Q 2 range.
The 3 He target polarimetry depended on a previously measured dimensionless quantity, KTO, which parametrizes the Rb-He frequency shift. A new analysis of the (unpublished) data of Ref. [18] shows that at 50°C K 0 =4.73 ±0.34, which is 22% lower than our quoted value. In order to confirm this number, we have made a more precise measurement of Ko using an entirely new method. We find Ko =4.92 ±0.15, in good agreement with the reanalysis. Combining these results gives KO =4.89 ±0.14. These experiments are being prepared for publication. The effect of the new value of KO is to increase the average 3 He polarization to 46%. Similarly, the typical initial target polarizations are increased to (50-65)%. Finally, P$, the muon polarization normalized to 100% 3 He target polarization, is decreased to /^ =0.056 ±0.006. The conclusions of our paper remain the same as this value for p£ is still a factor of -2-3 lower than predicted by the standard cascade theory. Equation (8), defining the asymmetry for quasielastic scattering, should read ^si_i_iilOi (8) Pe P3 f VR + TlL '
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.