Custodial SU(2) Violation and the Origin of Fermion Masses
نویسنده
چکیده
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 ρ–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. Heisenberg Fellow Email: T36 (A.B.) or Y29 (M.L.) at VM.URZ.UNI-HEIDELBERG.DE
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