We investigate the possibility of generating fermion masses through radiative corrections in the well-defined framework of SU(2)LX U(1). No-go theorems, however, imply a complete tree-level description of the spectrum with at least one electroweak singlet scalar and suggest therefore the need of new gauge interactions.
Gérard, J.-M. (1983). Fermion mass spectrum inSU(2)L×U(1). Zeitschrift für Physik C Particles and Fields, 18(2), 145-154. https://doi.org/10.1007/BF01572477 (Original work published 1983)