Neutrinos conclusively have mass since they experience flavor oscillations (if they were massless that would be impossible). Current estimates are that the tota

Neutrinos conclusively have mass since they experience flavor oscillations (if they were massless that would be impossible). Current estimates are that the total mass of all flavors of neutrinos is a fraction of 1 eV (less than a billionth the mass of a proton). Anyway, neutrinos aren't generally called "WIMPs" because they already have a name, the term "WIMP" is generally reserved for new particles that have yet to be directly observed.