V,W and X in Technicolour Models

Details V,W and X in Technicolour Models V,W and X in Technicolour Models

1993-11-30

arxiv.org/abs/hep-ph/9311375v1

Phys.Rev. D49 (1994) 4785-4792

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages + 2 pages of ps figs, SWAT/16

Scientific paper

10.1103/PhysRevD.49.4785

Light techni-fermions and pseudo Goldstone bosons that contribute to the electroweak radiative correction parameters V,W and X may relax the constraints on technicolour models from the experimental values of the parameters S and T. Order of magnitude estimates of the contributions to V,W and X from light techni-leptons are made when the the techni-neutrino has a small Dirac mass or a large Majorana mass. The contributions to V,W and X from pseudo Goldstone bosons are calculated in a gauged chiral Lagrangian. Estimates of V,W and X in one family technicolour models suggest that the upper bounds on S and T should be relaxed by between 0.1 and 1 depending upon the precise particle spectrum.

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