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We report a measurement of the parity-violating asymmetry in fixed target electron-electron (M{}ller) scattering: APV=[-175±30(stat)±20(syst)]×10^-9. This first direct observation of parity nonconservation in M{}ller scattering leads to a measurement of the electron's weak charge at low energy QWᵉ=-0.053±0.011. This is consistent with the standard model expectation at the current level of precision: ${sin}²{{θ}}W({M}Z{)}MS̄=0.2293±{}0.0024(stat)±{}0.0016(syst)±{}0.0006(theory)$.
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Anthony et al. (2004) studied this question.
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