In the 1990s, results from the Liquid Scintillator Neutrino Detector (LSND) at the Los Alamos National Laboratory in New Mexico suggested there might be a fourth flavour: a «sterile» neutrino that is even less inclined to interact with ordinary matter than the others. (newscientist.com)
An earlier experiment, called the Liquid Scintillator Neutrino Detector (LSND) carried out by the Los Alamos National Laboratory (LANL) in New Mexico, found an excess of electron neutrinos after bombarding a target with antimuon neutrinos (the muon neutrino's antimatter counterpart). (scientificamerican.com)
Each muon counter consists of 64 plastic scintillators, a TMP multi-pixel electronic acquisition and works together with the surface detector of the Pierre Auger Observatory. (auger.org)