Phys. Rev. Lett. 92, 181602 (2004) [4 pages]Observation of Parity Nonconservation in Møller Scattering
We report a measurement of the parity-violating asymmetry in fixed target electron-electron (Møller) scattering: APV=[-175±30(stat)±20(syst)]×10-9. This first direct observation of parity nonconservation in Møller 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: sin2θW(MZ)MS̅ =0.2293±0.0024(stat)±0.0016(syst)±0.0006(theory). © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.92.181602
DOI:
10.1103/PhysRevLett.92.181602
PACS:
11.30.Er, 12.15.Mm, 13.66.Jn, 13.88.+e
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