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Testing the standard model by precision measurement of the weak charges of quarks.
Phys Rev Lett
September 2007
Jefferson Lab, 12000 Jefferson Ave., Newport News, Virginia 23606, USA.
In a global analysis of the latest parity-violating electron scattering measurements on nuclear targets, we demonstrate a significant improvement in the experimental knowledge of the weak neutral-current lepton-quark interactions at low energy. The precision of this new result, combined with earlier atomic parity-violation measurements, places tight constraints on the size of possible contributions from physics beyond the standard model. Consequently, this result improves the lower-bound on the scale of relevant new physics to approximately 1 TeV.
View Article and Find Full Text PDFMeasurement of the weak neutral current via nuclear parity violation.
Phys Rev D Part Fields
January 1985
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