Kajita and McDonald won the 2015 Nobel Prize for discovering their flavor oscillations.
The T2K experiment to measure these particles' parameter theta-sub-1-3 uses an off-axis beam of these particles produced at the proton accelerator J-PARC. An experiment studying these particles used cadmium chloride to detect products of their interactions with protons. A perchloroethylene tank was used to detect these particles in an experiment where the final measurement was (*) one-third of what was predicted, leading to the solar problem of these particles. These particles which may be detected by looking for Cerenkov radiation in large underground chambers of water at experiments Homestake and Super-Kamiokande. Kajita and McDonald won the 2015 Nobel Prize for discovering their flavor oscillations. For 10 points, name these very light leptons that come in electron, muon, and tau varieties. 
The T2K experiment to measure these particles' parameter theta-sub-1-3 uses an off-axis beam of these particles produced at the proton accelerator J-PARC.
neutrinos