Transverse beam asymmetries measured from 4He and hydrogen targets
- 33 Downloads
The HAPPEX Collaboration at Jefferson Lab has measured the transverse beam spin asymmetries (AT) for elastic electron scattering from proton and 4He targets. The experiment was conducted using a vertically polarized electron beam of energy ∼ 3 GeV, at a Q 2 ∼ 0.1 GeV^2 and a scattering angle θlab ∼ 6° . The preliminary results are reported here. The 4He measurement is the first measurement of AT from a nucleus. AT for 4He is non-negligible; therefore, it will be necessary to make measurements of AT for future parity-violating experiments using nuclear targets.
PACS.25.30.Bf Elastic electron scattering 13.40.Gp Electromagnetic form factors 29.27.Hj Polarized beams
Unable to display preview. Download preview PDF.
- 3.K.D. Paschke, Transverse Asymmetries from HAPPEX and SLAC-E158, presented at Jefferson Laboratory Annual User's Group Meeting, 2005, unpublished.Google Scholar
- 10.Private communication with A.V. Afanasev.Google Scholar
- 11.R. Michaels, P.A. Souder, G.M. Urciuoli, spokespersons: TJNAF Experiment E06-002.Google Scholar