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New measurements of the transverse beam asymmetry for elastic electron scattering from selected nuclei

Abstract:

We have measured the beam-normal single-spin asymmetry A n in the elastic scattering of 1-3 GeV transversely polarized electrons from H1 and for the first time from He4, C12, and Pb208. For H1, He4, and C12, 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 Pb208 result is significantly smaller than the corresponding prediction using the same formalism. These...

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Journal:
Physical Review Letters
Volume:
109
Issue:
19
Publication date:
2012-11-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:2f606f6f-405d-4bf9-a479-f88f68f44ab9
Source identifiers:
366905
Local pid:
pubs:366905
Language:
English

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