Atmospheric Neutrino Oscillation and a Phenomenological Lepton Mass Matrix
Abstract
We propose simple phenomenological lepton mass matrices which describe the three neutrinos almost degenerate in mass, leading to a very large mixing angle between
ν
μ
and
ν
τ
, as consistent with a recent report on atmospheric neutrino oscillation from the Superkamiokande collaboration. Our matrix model also gives
ν
e
−
ν
μ
mixing in agreement with the value required for neutrino oscillation to explain the solar neutrino problem.