Dynamical seesaw mechanism for Dirac neutrinos
  So far we have not been able to establish that, as theoretically expected, neutrinos are their own anti-particles. Here we propose a dynamical way to account for the Dirac nature of neutrinos and the smallness of their mass in terms of a new variant of the seesaw paradigm in which the energy scale of neutrino mass generation could be accessible to the current LHC experiments. 
Jos\'e W.F. Valle and C.A. Vaquera-Araujo
hep-ph