João Coelho

The 68 percent and 90 percent confidence limits for the mixing parameters Δm232 and sin2θ23 resulting from a combined fit to the MINOS data for muon-neutrino disappearance and electron-neutrino appearance. The best fit occurs in the inverted hierarchy and lower octant at a value of (0.41, -2.41×10-3 eV2), as indicated by the star. For many years neutrinos were assumed to be massless. This assumption stemmed from the incredible smallness of their masses and the remarkable weakness of their interactions. The…