Results on Double-polarization Asymmetries in Quasielastic Scattering from Polarized He-3

EPJ Web of Conferences(2016)

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摘要
The He-3 nucleus has become extremely important in the investigation of the neutron's spin structure. When polarized, He-3 acts as an effective polarized neutron target and hence facilitates our understanding of the neutron's internal structure. However, to be used in this manner, our understanding of the internal structure of He-3 is of extreme importance. As the precision of experiments has improved, the extraction of polarized neutron information from He-3 leads to an ever larger share of the systematic uncertainty for these experiments. In these proceedings, I present a precise measurement of beam-target asymmetries in the (3)(H) over right arrowe ((e) over right arrow, e' d) and (3)(H) over right arrowe ((e) over right arrow, e' p) reactions. The former process is a uniquely sensitive probe of hadron dynamics in He-3 and the structure of the underlying electromagnetic currents. The measurements have been performed around the quasi-elastic peak at Q(2) = 0.25 (GeV/c)(2) and 0.35 (GeV/c)(2) for recoil momenta up to 270 MeV/c. The experimental apparatus, analysis and results were presented together with a comparison to state-of-the art Faddeev calculations.
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关键词
quasielastic scattering,polarized3he,double-polarization
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