Observation of Parity Nonconservation in Moller Scattering

et al; the SLAC E158 Collaboration: P.L. Anthony

Observation of Parity Nonconservation in Moller Scattering

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arxiv hep-ex/0312035 v3 pith:UQHFTJRQ submitted 2003-12-10 hep-ex nucl-ex

the SLAC E158 Collaboration: P.L. Anthony , et al This is my paper · ORCID

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keywords mollerscatteringmeasurementnonconservationobservationparitystatsyst

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We report a measurement of the parity-violating asymmetry in fixed target electron-electron (Moller) scattering: A_PV = -175 +/- 30 (stat.) +/- 20 (syst.) parts per billion. This first direct observation of parity nonconservation in Moller scattering leads to a measurement of the electron's weak charge at low energy Q^e_W = -0.053 +/- 0.011. This is consistent with the Standard Model expectation at the current level of precision: sin^2\theta_W(M_Z)_MSbar = 0.2293 +/- 0.0024 (stat.) +/- 0.0016 (syst.) +/- 0.0006 (theory).

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