Parity-violating electron deuteron scattering and the proton's neutral weak axial vector form factor

We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from the deuteron at backward angles at Q(2)=0.038 (GeV/c)(2). This quantity provides a determination of the neutral weak axial vector form factor of the nucleon, which can potentially receive large electroweak corrections. The measured asymmetry A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q(2)=0.091 (GeV/c)(2), which are also consistent with theoretical predictions.


Published in:
PHYSICAL REVIEW LETTERS, 92, 10, 102003
Year:
2004
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 Record created 2008-11-07, last modified 2018-12-03

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