Precision Measurement of the Weak Mixing Angle in Møller Scattering

Precision measurement of the weak mixing angle in Møller scattering.

We report on a precision measurement of the parity-violating asymmetry in fixed target electron-electron (Møller) scattering: A(PV) = [-131 +/- 14(stat) +/- 10(syst)] x 10(-9), leading to the determination of the weak mixing angle sin2(thetaW(eff) = 0.2397 +/- 0.0010(stat) +/- 0.0008(syst), evaluated at Q2 = 0.026 GeV2. Combining this result with the measurements of sin2(thetaW(eff) at the Z0 p...

Precision Beam Parameter Monitoring in a Measurement of the Weak Mixing Angle in Møller Scattering

An Ultra-precise Measurement of the Weak Mixing Angle using Møller Scattering

We propose to measure the parity-violating asymmetry APV in the scattering of longitudinally polarized 11 GeV electrons from the atomic electrons in a liquid hydrogen target (Møller scattering). In the Standard Model, APV is due to the interference between the electromagnetic amplitude and the weak neutral current amplitude, the latter being mediated by the Z boson. APV is predicted to be 35.6 ...

The MOLLER Experiment Measurement Of Lepton Lepton Elastic Reactions An Ultra-precise Measurement of the Weak Mixing Angle using Møller Scattering

The upgraded 11 GeV CEBAF polarized electron beam presents a compelling opportunity to measure a weak neutral current amplitude to unprecedented precision at Q ! M Z . The result would yield a precise measurement of the weak mixing angle sin θW , a fundamental parameter of the electroweak theory. The experimental goal of δ(sin θW ) ∼ 0.1%, matching the accuracy of the two single best measuremen...

Precise measurement of the weak mixing angle in neutrino-nucleon scattering.