Chiral Dynamics in the electroweak sector

Details Chiral Dynamics in the electroweak sector Chiral Dynamics in the electroweak sector

2000-10-30

arxiv.org/abs/hep-ph/0010330v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

2 pages, Latex (sprocl.sty); Talk held at the Workshop Chiral Dynamics 2000, Newport News, USA, 17-22 July 2000

Scientific paper

Using a chiral Lagrangian we show that strongly interacting models of electroweak symmetry breaking are not in conflict with precision data. Such models, like Technicolor, need not lead to a heavy Higgs-like signal. Furthermore, the allowed values for the low-energy constants in the effective Lagrangian, derived from bounds on the oblique correction parameters S,T,U, are not unnatural. Finally, we point out that there are some problems with gauge invariance, if one tries to relate the oblique parameters to the low-energy constants in the ordinary chiral Lagrangian for QCD of Gasser and Leutwyler. In particular, S cannot be identified with l_5^{GL}.

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