Abstract
We have measured the beam-normal single-spin asymmetry in elastic scattering of transversely polarized 3 GeV electrons from unpolarized protons at , . The results are inconsistent with calculations solely using the elastic nucleon intermediate state and generally agree with calculations with significant inelastic hadronic intermediate state contributions. provides a direct probe of the imaginary component of the exchange amplitude, the complete description of which is important in the interpretation of data from precision electron-scattering experiments.
- Received 11 May 2007
DOI:https://doi.org/10.1103/PhysRevLett.99.092301
©2007 American Physical Society