GUT predictions for quark and lepton mass ratios
Stefan Antusch, Martin Spinrath
TL;DR
This paper explores how grand unified theories (GUTs) predict specific ratios of quark and lepton masses at high energies, considering supersymmetric threshold effects and comparing predictions with experimental data across different SUSY scenarios.
Contribution
It derives new GUT scale mass ratio predictions and analyzes their viability under various supersymmetric threshold corrections.
Findings
New predictions for m_ /m_s, y_ /y_b, y_t/y_b ratios
Comparison of predictions with experimental ranges for different SUSY models
Identification of conditions under which GUT predictions remain viable
Abstract
Group theoretical factors from GUT symmetry breaking can lead to predictions for the ratios of quark and lepton masses at the unification scale. Due to supersymmetric (SUSY) threshold corrections the viability of such predictions can depend strongly on the SUSY parameters. We derive possible new predictions for the GUT scale ratios m_\mu/m_s, y_\tau/y_b and y_t/y_b and compare them with the experimentally allowed ranges for three common SUSY breaking scenarios.
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