Custodial SU(2) Violation and the Origin of Fermion Masses

Details Custodial SU(2) Violation and the Origin of Fermion Masses Custodial SU(2) Violation and the Origin of Fermion Masses

1993-04-19

arxiv.org/abs/hep-ph/9304269v1

Nucl.Phys. B407 (1993) 173-190

Physics

High Energy Physics

High Energy Physics - Phenomenology

HD-THEP-92-55, 18 pages and 2 pages of figures appended as Postscript file

Scientific paper

10.1016/0550-3213(93)90278-W

Custodial $SU(2)$ breaking due to dynamical fermion masses is studied in a rather general context and it is shown how some well known limiting cases are correctly described. The type of ``gap equation'' which can systematically lead to extra negative contributions to the so--called $\rho$--parameter is emphasized. Furthermore general model independent features are discussed and it is shown how electro--weak precision measurements can be sensitive to the fermion content and/or dynamical features of a given theory.

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