(a) Allowed region of the neutrino oscillation parameter from KamLAND antineutrino data (colored regions) and solar neutrino experiments (lines) . (b) the result of a combined two-neutrino oscillation analysis of KamLAND and the observed solar neutrino fluxes under the assumption of CPT invariance. Taken from .
Article of the Year Award: Outstanding research contributions of 2020, as selected by our Chief Editors. Read the winning articles.