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Parity-violating electron scattering from 4He and the strange electric form factor of the nucleon.

Abstract:
We have measured the parity-violating electroweak asymmetry in the elastic scattering of polarized electrons from 4He at an average scattering angle = 5.7 degrees and a four-momentum transfer Q2 = 0.091 GeV2 . From these data, for the first time, the strange electric form factor of the nucleon G(E)s can be isolated. The measured asymmetry of A(PV) = (6.72 +/- 0.84(stat) +/- 0.21(syst) x 10(-6) yields a value of G(E)s = -0.038 +/- 0.042(stat) +/- 0.010(syst), consistent with zero.
Publication status:
Published

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Journal:
Physical Review Letters More from this journal
Volume:
96
Issue:
2
Pages:
022003
Publication date:
2006-01-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Keywords:
Pubs id:
pubs:172781
UUID:
uuid:b8059b13-7ea0-4d49-b539-5c336bc22aac
Local pid:
pubs:172781
Source identifiers:
172781
Deposit date:
2012-12-19

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