Precocious Gauge Symmetry Breaking in $SU(6) \times SU(2)_R$ Model

Details Precocious Gauge Symmetry Breaking in $SU(6) \times SU(2)_R$ Model Precocious Gauge Symmetry Breaking in $SU(6) \times SU(2)_R$ Model

2002-08-31

arxiv.org/abs/hep-ph/0209004v1

Prog.Theor.Phys. 109 (2003) 651-662

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 2 figures

Scientific paper

10.1143/PTP.109.651

In the $SU(6) \times SU(2)_R$ string-inspired model, we evolve the couplings and the masses down from the string scale $M_S$ using the renormalization group equations and minimize the effective potential. This model has the flavor symmetry including the binary dihedral group $\tilde{D}_4$. We show that the scalar mass squared of the gauge non-singlet matter field possibly goes negative slightly below the string scale. As a consequence, the precocious radiative breaking of the gauge symmetry down to the standard model gauge group can occur. In the present model, the large Yukawa coupling which plays an important role in the symmetry breaking is identical with the colored Higgs coupling related to the longevity of the proton.

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