Vector analyzing power in elastic electron-nucleus scattering

E. D. Cooper, C. J. Horowitz

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Vector analyzing power An is calculated for elastic electron scattering from a variety of spin-zero nuclei at energies from 14 MeV to 3 GeV. Time-reversal symmetry ensures that An vanish in the first Born approximation. Therefore An depends on Coulomb distortions and can be large for scattering from heavy nuclei. The vector analyzing power is a potential source of systematic error for parity-violation experiments. We find that An=-0.361 ppm for the kinematics of the parity radius experiment involving 850-MeV electrons scattering at 6° from Pb208. This is comparable with the parity-violating asymmetry. However, for HAPPEX He involving 3-GeV electrons scattering on He4 we find that An is very small.

Original languageEnglish
Article number034602
JournalPhysical Review C - Nuclear Physics
Issue number3
StatePublished - Sep 2005
Externally publishedYes


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