Higgs and Top quark coupled with a conformal gauge sector

Details Higgs and Top quark coupled with a conformal gauge sector Higgs and Top quark coupled with a conformal gauge sector

2007-05-03

arxiv.org/abs/0705.0443v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 3 Postscript figures, uses RevTex.sty; corrected typos and references

Scientific paper

We propose a dynamical scenario beyond the standard model, in which the radiative correction to the Higgs mass parameter is suppressed due to a large anomalous dimension induced through a conformal invariant coupling with an extra gauge sector. Then the anomalous dimension also suppresses the Yukawa couplings of the Higgs field. However, the large top Yukawa coupling can be generated effectively through mixing among top quarks and the fermions of the conformal gauge sector. This scenario is found to predict a fairly heavy Higgs mass of about 500 GeV. We present an explicit model and show consistency with the Electro-Weak precision measurements of the S and T parameters as well as the Z boson decay width.

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