The smallest neutrino mass
arXiv:hep-ph/0611389 · doi:10.1016/j.physletb.2007.01.015
Abstract
We consider models where one Majorana neutrino is massless at tree level (like the see saw with two right-handed neutrinos), and compute the contribution to its mass m generated by two-loop quantum corrections. The result is m \sim 10^{-13}eV in the SM and m \sim 10^{-10} eV (tanBeta/10)^4 in the MSSM, compatible with the restricted range suggested by Affleck-Dine baryogenesis.
6 pages. v2: final version to appear on PLB; important reference added