# Current known *lower* bounds to the neutrino masses?

I started a little bit of Googling around the topic, and found very few information. There are mainly upper limits. I found lower limits only to the rest mass differences of the different neutrino flavors.

Thus, what are the actually current known lower mass limits to the neutrino flavors?

• I don't have a reference handy, but I believe you have correctly stated the situation. We know that there are three different neutrino mass states, but we don't know whether the lightest neutrino is massive or massless. – rob Jun 17 '14 at 17:49
• @rob Thank you. If it is so, then we have a lower limit at least for the second lightest neutrino? – user259412 Jun 17 '14 at 18:04
• The differences of the square masses are known (to within a sign in one case). From that you can determine the lower bound on the heaviest mass state, and (modulo knowing the hierarchy) you can place a lower bound on the middle mass state. Beyond that you're stuck. – dmckee Jun 17 '14 at 19:10

• I am sorry, but I don't know any experimental result about this. There is an ongoing, \$60million experiment in Karlsruhe, Germany (KATRIN), which will measure the mass of the anti-electron neutrino, if it is over$\approx$0.13eV. – user259412 Apr 13 '17 at 18:52 • These values don't even respect the known$\Delta (m^2)\$s. – dmckee Apr 13 '17 at 19:35