Document Type
Article
Department/Program
Physics
Journal Title
Physical Review Letters
Pub Date
2012
Volume
109
Issue
19
Abstract
We have measured the beam-normal single-spin asymmetry An in the elastic scattering of 1-3 GeV transversely polarized electrons from H-1 and for the first time from He-4, C-12, and Pb-208. For H-1, He-4, and C-12, the measurements are in agreement with calculations that relate A(n) to the imaginary part of the two-photon exchange amplitude including inelastic intermediate states. Surprisingly, the Pb-208 result is significantly smaller than the corresponding prediction using the same formalism. These results suggest that a systematic set of new A(n) measurements might emerge as a new and sensitive probe of the structure of heavy nuclei.
Recommended Citation
Abrahamyan, S.; Shahinyan, A.; Arrington, J.; Armstrong, D. S.; Averett, Todd; Bailey, S. L.; Deconinck, W.; Finn, J. M.; Fuchs, S. A.; Glesener, L. E.; Grimm, K.; Hoskins, J.; Jensen, E.; Katich, J.; Leckey, J.; and Lee, J. H., New Measurements of the Transverse Beam Asymmetry for Elastic Electron Scattering from Selected Nuclei (2012). Physical Review Letters, 109(19).
10.1103/PhysRevLett.109.192501
DOI
10.1103/PhysRevLett.109.192501
