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Quark and lepton masses from top loops
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Quark and lepton masses from top loops
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Assuming that the leptons and quarks other than top are massless at tree level, we show that their masses may be induced by loops involving the top quark. As a result, the generic features of the fermion mass spectrum arise from combinations of loop factors. Explicitly, we construct a renormalizable model involving a few new particles, which leads to 1-loop bottom and tau masses, a 2-loop charm mass, 3-loop muon and strange masses, and 4-loop masses for first generation fermions. This realistic pattern of masses does not require any symmetry to differentiate the three generations of fermions. The new particles may produce observable effects in future experiments searching for mu to e conversion in nuclei, rare meson decays, and other processes.
Forward citations
Cited by 2 Pith papers
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Classification of minimal models producing b, c and tau masses at one-loop level
A systematic catalogue of 25 minimal radiative mass models for b, c, and τ, including eight 'hybrid' models whose Yukawa couplings can lie above, below, or exactly at the Standard Model prediction.
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Higgs Yukawa coupling constraints on a benchmark one-loop radiative mass model for the bottom, charm and tau
A radiative one-loop mass model for b, c, τ, and ντ remains consistent with current Higgs and EW data, and future Yukawa-precision measurements are projected to tighten, but not close, its viable parameter space.
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