title: Scales of mass generation for quarks, leptons, and majorana neutrinos.
abstract: We study 2-->n inelastic fermion-(anti)fermion scattering into multiple longitudinal weak gauge bosons and derive universal upper bounds on the scales of fermion mass generation by imposing unitarity of the S matrix. We place new upper limits on the scales of fermion mass generation, independent of the electroweak symmetry breaking scale. Strikingly, we find that the strongest 2-->n limits fall in a narrow range, 3-170 TeV (with n=2-24), depending on the observed fermion masses.
authors.affiliation: Center for Particle Physics and Department of Physics, University of Texas at Austin, TX 78712, USA.
authors.forename: Duane A
authors.initials: DA
authors.lastname: Dicus
authors.forename: Hong-Jian
authors.initials: HJ
authors.lastname: He