Neutrinos: Projecting onto the Future

Abstract

Three areas of research are outlined in which substantial progress is expected. 1). Results of measurements of the 1-3 and 2-3 mixing confirm relation between the corresponding angles which follow from the equality U PMNS = V † CKM U X , where U X is the matrix of special form related to generation of small neutrino masses. The latter implies kind of quark-lepton symmetry or unification (GUT). 2). Future solar neutrino studies will be focused on detailed measurements of the Day-Night effect and upturn of spectrum. In long term perspective the Earth matter effects on the 7 Be line may be accessible with very interesting results. 3). The present-day hint of δ CP ∼ −π/2 looks very intriguing (indicating certain symmetry). A possibility to measure the CP-phase by multi-megaton detectors of atmospheric neutrinos with low threshold (future upgrades of PINGU and ORCA) should be explored. Preliminary estimations look encouraging. Some guesses about future developments in other directions of neutrino physics are presented.