Predictive Ansatz for Fermion Masses in SUSY GUTS

Abstract

We reexamine a succesful fermion mass Ansatz proposed by Giudice for a wide range of the ratio $tan\beta =\frac{<\bar{h}>}{<h>}$ (where $\bar{h},h$ are the two standard higgs fields), in the context of supersymmetric grand unified theories. We find that the 7 predictions of the ansatz, $V_{us},V_{cb},V_{ub},m_u,m_d,m_s$ and $m_b$ are in good agreement with the experiment when either {\it i) } $tan\beta \simeq 1$ or {\it ii)} $tan\beta \ge 30$. A correct prediction for the bottom mass gives a lower limit on $m_t\ge 125$ for case {\it (i)}, in agreement with the previous analysis, while in case {\it (ii)} $m_t\ge 145$.

8 pages, 3 figures NOT included, available on request, LaTex, IOA 281/92, NTUA 37/92 preprints

References in corpus (2)

• Test of the Dimopouos-Hall-Raby Ansatz for Fermion Mass Matrices
• From Fermion Mass Matrices to Neutrino Oscillations

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• Large Top and Bottom Yukawa Couplings in Minimal Supersymmetry
• A Predictive SO(10) Scheme for Fermion Masses and Mixings
• Symmetries at ultrahigh energies and searches for neutrino oscillations
• Neutrino properties from maximally-predictive GUT models and the structure of the heavy Majorana sector
• Analytic Approach to the MSSM Mass Spectrum in the Large Tan$\beta$ Regime
• Implications of a Heavy Top in Supersymmetric Theories