Journal article

Has the origin of the third-family fermion masses been determined?

MJ Baker, P Cox, RR Volkas

The Journal of High Energy Physics | Springer Verlag (Germany) | Published : 2021


Precision measurements of the Higgs couplings are, for the first time, directly probing the mechanism of fermion mass generation. The purpose of this work is to determine to what extent these measurements can distinguish between the tree-level mechanism of the Standard Model and the theoretically motivated alternative of radiative mass generation. Focusing on the third-family, we classify the minimal one-loop models and find that they fall into two general classes. By exploring several benchmark models in detail, we demonstrate that a radiative origin for the tau-lepton and bottom-quark masses is consistent with current observations. While future colliders will not be able to rule out a radi..

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Funding Acknowledgements

The authors would like to thank John Gargalionis for useful discussion and collaboration in the initial stages of this project. This work was supported by the Australian Government through the Australian Research Council.