title: Testing the standard model by precision measurement of the weak charges of quarks.
abstract: 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.
authors.affiliation: Jefferson Lab, 12000 Jefferson Ave., Newport News, Virginia 23606, USA.
authors.forename: R D
authors.initials: RD
authors.lastname: Young
authors.forename: R D
authors.initials: RD
authors.lastname: Carlini
authors.forename: A W
authors.initials: AW
authors.lastname: Thomas
authors.forename: J
authors.initials: J
authors.lastname: Roche