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arXiv · hep-ph/9210251

Heavy top quark from Fritzsch mass matrices

K. S. Babu·Q. Shafi
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Abstract

It is shown, contrary to common belief, that the Fritzsch ansatz for the quark mass matrices admits a heavy top quark. With the ansatz prescribed at the supersymmetric grand unified (GUT) scale, one finds that the top quark may be as heavy as 145 GeV, provided that tan$β$ (the ratio of the vacuum expectation values of the two higgs doublets) $\gg 1$. Within a non-supersymmetric GUT framework with two (one) light higgs doublets, the corresponding approximate upper bound on the top mass is $120~ (90)$ GeV. Our results are based on a general one--loop renormalization group analysis of the quark masses and mixing angles and are readily applied to alternative mass matrix ansätze.

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K. S. Babu, Q. Shafi. 1992-10-20. Heavy top quark from Fritzsch mass matrices. https://doi.org/10.1103/physrevd.47.5004

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