Testing the Standard Model by precision measurement of the weak charges of quarks

Details Testing the Standard Model by precision measurement of the weak charges of quarks Testing the Standard Model by precision measurement of the weak charges of quarks

2007-04-20

arxiv.org/abs/0704.2618v2

Phys.Rev.Lett.99:122003,2007

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures; v2: further details on extraction of electroweak parameters, new figure

Scientific paper

10.1103/PhysRevLett.99.122003

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 ~1 TeV.

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