Neutrinos, the poltergeists of elementary particles, have long challenged experimental physicists. Since their discovery by Los Alamos researchers Fred Reines and Clyde Cowan in 1956, an understanding of neutrino rest mass has evaded experimentalists world-wide.
The Liquid Scintillator Neutrino Detector (LSND) experiment, constructed at Los Alamos in 1993, was designed to search for neutrino oscillations. Located 30 meters away from the 800 MeV proton beam dump of the LANSCE linac, LSND recorded neutrino interactions from 1993 to 1998. The final analysis of the data has now been completed. Taken together with other oscillation results, the data raise questions about our understanding of neutrinos. The future of this line of research will also be discussed.