The LSND project was created to look for evidence of neutrino oscillation, and its results conflict with the Standard Model expectation of only three neutrino flavors, when considered in the context of other solar and atmospheric neutrino oscillation experiments.
Cosmological data bound the mass of the sterile neutrino to ms < 0.26eV (0.44eV) at 95% (99.9%) confidence limit, excluding at high significance the sterile neutrino hypothesis as an explanation of the LSND anomaly.
[1] The controversial LSND result was tested by the MiniBooNE experiment at Fermilab which has found similar evidence for oscillations.
The detector consisted of a tank filled with 167 tons (50,000 gallons) of mineral oil and 14 pounds (6.4 kg) of b-PDB (2-(4-tert-butylphenyl)-5-(4-biphenyl)-1,3,4-oxadiazole) organic scintillator material.
Cherenkov light emitted by particle interactions was detected by an array of 1220 photomultiplier tubes.