Verifiable radiative seesaw mechanism of neutrino mass and dark matter

Abstract

Neutrino oscillations have established that neutrinos ${\ensuremath{\nu}}_{i}$ have very small masses. Theoretically, they are believed to arise through the famous seesaw mechanism from their very heavy and unobservable Dirac mass partners ${N}_{i}$. It is proposed here in a new minimal extension of the standard model with a second scalar doublet (${\ensuremath{\eta}}^{+}$, ${\ensuremath{\eta}}^{0}$) that the seesaw mechanism is actually radiative, and that ${N}_{i}$ and (${\ensuremath{\eta}}^{+}$, ${\ensuremath{\eta}}^{0}$) are experimentally observable at the forthcoming Large Hadron Collider, with the bonus that the lightest of them is also an excellent candidate for the dark matter of the Universe.