Abstract
We report on an intriguing observation that the values of all the couplings in the standard model, except those related to first two generations, can be understood from the IR fixed point structure of renormalization group equations in the minimal supersymmetric model extended by one complete vectorlike family with the scale of new physics in a multi-TeV range.
Highlights
Introduction.—Out of 17 dimensionless couplings of the standard model (SM) only seven are sizable: the three gauge couplings of the SUð3Þ × SUð2Þ × Uð1Þ symmetry, the top, bottom, and tau Yukawa couplings leading to masses of third generation fermions and the Higgs quartic coupling inferred from the Higgs boson mass
The structure of the renormalization group (RG) equations of a given model may lead to a certain pattern in model parameters far below the fundamental scale that depends very little on boundary conditions
We show that all the couplings of the SM except those related to first two generations can be understood from the IR fixed point structure of RG equations in the minimal supersymmetric model extended by one complete vectorlike family (MSSM þ 1VF) with the scale of new physics in a multi-TeV range
Summary
Introduction.—Out of 17 dimensionless couplings of the standard model (SM) only seven are sizable: the three gauge couplings of the SUð3Þ × SUð2Þ × Uð1Þ symmetry, the top, bottom, and tau Yukawa couplings leading to masses of third generation fermions and the Higgs quartic coupling inferred from the Higgs boson mass. We show that all the couplings of the SM except those related to first two generations can be understood from the IR fixed point structure of RG equations in the minimal supersymmetric model extended by one complete vectorlike family (MSSM þ 1VF) with the scale of new physics in a multi-TeV range.
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