2012/09/12 by E. Long, Long, Elena
Engineering · Physics and Astronomy · #Atomic and Subatomic Physics Research #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Quantum, superfluid, helium dynamics #Superconducting Materials and Applications
paper · pdf · doi:10.48550/arxiv.1209.2739
openalex publication_date 2012/09/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Asymmetry measurements were conducted in Jefferson Lab's experimental Hall A through electron scattering from a polarized 3He target in the quasi-elastic 3He(e,e'n) reaction. Measurements were made with the target polarized in the longitudinal direction with respect to the incoming electrons (AL), in a transverse direction that was orthogonal to the beam-line and parallel to the q-vector (AT), and in a vertical direction that was orthogonal to both the beam-line and the q-vector (Ay0). The experiment measured Ay0 at four-momentum transfer squared (Q2) of 0.127 (GeV/c)2, 0.456 (GeV/c)2, and 0.953 (GeV/c)2. The AT and AL asymmetries were both measured at Q2 of 0.505 (GeV/c)2 and 0.953 (GeV/c)2. This is the first time that three orthogonal asymmetries have been measured simultaneously. Results from this experiment are compared with the plane wave impulse approximation (PWIA) and Faddeev calculations. These results provide important tests of models that use 3He as an effective neutron target and show that the PWIA holds above Q2 of 0.953 (GeV/c)2.