César Bernardes High-energy colliders as a probe of neutrino properties O. G. Miranda, J. W. F. Valle, G. Sanchez Garcia, Sanjoy Mandal, Xun-Jie Xu Hide abstract | Show figures | Show BibTeX | Show discussion | View PDF | 2202.04502v1 The mediators of neutrino mass generation can provide a probe of neutrino properties at the next round of high-energy hadron (FCC-hh) and lepton colliders (FCC-ee/ILC/CEPC/CLIC). We show how the decays of the Higgs triplet scalars mediating the simplest seesaw mechanism can shed light on the neutrino mass scale and mass-ordering, as well as the atmospheric octant. Four-lepton signatures at the high-energy frontier may provide the discovery-site for charged lepton flavour non-conservation in nature, rather than low-energy intensity frontier experiments. Authors' comments: 7 pages, 4 figures