2000/08/18 by C. S. Lam, Lam, C. S.
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/0008203
7 pages, no figures
arxiv created 2000/08/18 · openalex publication_date 2000/08/18 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A Z2L× Z2R generation symmetry in the neutrino sector predicts the atmospheric neutrino mixing to be maximal, and the MNS matrix element Ue3 to be zero, consistent with observations. Solar neutrino mixing may be maximal but is not required by the symmetry. Neutrino masses of the first two generations are predicted to vanish, providing a first approximation to the oscillation data. The consequence of a smaller Z2 symmetry is also discussed. In that case, deviation from the Z2L× Z2R result is of the order of the neutrino mass ratio between the first two generations and the third generation.