Neutrino spectrum from theory and experimentsANJAN S JOSHIPURATheoretical Physics Group, Physical Research Laboratory, Navarangpura, Ahmedabad 380 009, India Abstract The observed deficits in the solar and atmospheric neutrino fluxes along with the accelerator results on neutrino oscillations significantly constrain possible mass and mixing patterns among neutrinos. We discuss possible patterns emerging from the experimental results and review theoretical attempts to understand them. Keywords Neutrino masses and mixing; seesaw model.PACS No. 14.60 Pq; 11.30 Pb |