Masses, Mixings, Yukawa Couplings and their Symmetries

Details Masses, Mixings, Yukawa Couplings and their Symmetries Masses, Mixings, Yukawa Couplings and their Symmetries

1993-02-24

arxiv.org/abs/hep-ph/9302301v1

Phys.Lett. B305 (1993) 90-97

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, LaTeX, CERN-TH.6801/93

Scientific paper

10.1016/0370-2693(93)91110-9

We present a method to find the number of real and imaginary observable parameters coming from the Yukawa sector in an arbitrary gauge theory. The method leads naturally to a classification of Yukawa couplings according to their symmetries and suggests a new parametrization of masses and mixings that is useful to study the behaviour of Yukawa couplings under the renormalization group. We apply it to some examples based on the Standard Model with Yukawa couplings obeying various chiral symmetries. We also show how our method of parameter counting can be used in some models with an enlarged leptonic sector.

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