Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-06-24
Phys.Rev.D59:035009,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
revised version with same conclusions. To appear in Phys. Rev. D
Scientific paper
10.1103/PhysRevD.59.035009
In the presence of ${\bf 126 + \bar{126}}$ Higgs multiplets in a SO(10) theory, the fermion masses get contributions from an induced vacuum expectation value (VEV) of a $SU(2)_L$ doublet residing in ${\bf 126}$ which differentiates between quarks and leptons by a relative sign leading to a significant correction to the prediction of the mass ratio of the bottom quark and the tau lepton for ranges of the mass of this extra doublet. We perform a two-loop renormalization group analysis of the minimal version of the one-step supersymmetric SO(10) model to display this and re-calculate the corrections to the top quark mass in the presence of such an induced VEV. We show that these effects make the infra-red fixed point scenario consistent with experimental results.
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