Parity-violating Electron Deuteron Scattering and the Proton’s Neutral Weak Axial Vector Form Factor
Real, J. S.
Ito, T. et al. "Parity-violating Electron Deuteron Scattering and the Proton's Neutral Weak Axial Vector Form Factor." Physical Review Letters 92, no. 10 (2004): 102003.
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We report on a new measurement of the parity-violating asymmetry in quasielastic electron scat- tering from the deuteron at backward angles at Q2 = 0.038 (GeV/c)2. This quantity provides a de- termination 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 (sys) ppm is consistent with theoretical predictions. We also report on updated results of the previous experiment at Q2 = 0.091 (GeV/c)2, which are also consistent with theoretical predictions.