A Global Fit to Extended Oblique Parameters

Details A Global Fit to Extended Oblique Parameters A Global Fit to Extended Oblique Parameters

1993-07-26

arxiv.org/abs/hep-ph/9307337v2

Phys. Lett. B326 (1994) 276-281

Physics

High Energy Physics

High Energy Physics - Phenomenology

Plain TeX, 11 pages, one figure (ps file enclosed), (replaced version corrects minor TeX problem, text unchanged) UdeM-LPN-TH-

Scientific paper

10.1016/0370-2693(94)91322-6

The STU formalism of Peskin and Takeuchi is an elegant method for encoding the measurable effects of new physics which couples to light fermions dominantly through its effects on electroweak boson propagation. However, this formalism cannot handle the case where the scale of new physics is not much larger than the weak scale. In this case three new parameters (V, W and X) are required. We perform a global fit to precision electroweak data for these six parameters. Our results differ from what is found for just STU. In particular we find that the preference for S < 0 is not maintained.

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