Technicolor Theories with Negative S

Details Technicolor Theories with Negative S Technicolor Theories with Negative S

1992-09-19

arxiv.org/abs/hep-ph/9209255v2

Phys.Rev.Lett.70:529,1993

Physics

High Energy Physics

High Energy Physics - Phenomenology

(LBL-32893, UCB-PTH 92/34, 10 pages; we added a discussion of uncertainties, fine-tuning, and SU(2) asymptotic freedom; the co

Scientific paper

10.1103/PhysRevLett.70.529

We show that the pseudo Nambu--Goldstone boson contribution to the Peskin--Takeuchi electroweak parameter $S$ can be negative in a class of technicolor theories. This negative contribution can be large enough to cancel the positive techni-hadron contribution, showing that electroweak precision tests alone cannot be used to rule out technicolor as the mechanism of electroweak symmetry breaking.

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