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- W1977061830 abstract "A class of supersymmetric models is discussed in which radiative quark mass as well as Kobayashi-Maskawa (KM) and neutral-current mixing hierarchies are obtained with all Yukawa couplings of the same order and no horizontal symmetries. The presence of a single mirror family is crucial. The respective KM mixing angles of the top quark and mirror top quark (${t}^{ensuremath{'}}$) are of the same order (in particular, ${V}_{mathrm{tb}}ensuremath{sim}{V}_{{t}^{ensuremath{'}}b}ensuremath{sim}1$). The lighter of the two top quarks typically has a mass ensuremath{lesssim}100 GeV while the mirror bottom quark, considerably heavier than either top quark, typically has a mass ensuremath{lesssim}300 GeV. The main experimental consequence of the neutral-current mixing matrix is $B(Zensuremath{rightarrow}overline{c}t+coverline{t})ensuremath{sim}{10}^{ensuremath{-}4}ensuremath{-}{10}^{ensuremath{-}5}$ (if ${m}_{t}<{m}_{Z}ensuremath{-}{m}_{c}$), with similar branching ratio for charm+mirror top quark. These decays should be observable at CERN LEP given ${10}^{7}$ $Z'mathrm{s}$. The models provide a promising framework for nonperturbative Maiani-Parisi-Petronzio unification. The field content can, in principle, be obtained from the superstring and a search for two-generation string vacua is advocated." @default.
- W1977061830 created "2016-06-24" @default.
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- W1977061830 date "1989-07-01" @default.
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- W1977061830 title "Radiative quark mass and mixing hierarchies from supersymmetric models with a fourth mirror family" @default.
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- W1977061830 doi "https://doi.org/10.1103/physrevd.40.173" @default.
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