MiniBooNE

A neutrino beam consisting primarily of muon neutrinos is directed at a detector filled with 800 tons of mineral oil (ultrarefined methylene compounds) and lined with 1,280 photomultiplier tubes.

[3] In May 2018, physicists of the MiniBooNE experiment reported a possible signal indicating the existence of sterile neutrinos.

Data from the LSND experiment at Los Alamos National Laboratory are controversial since they are not compatible with the oscillation parameters measured by other neutrino experiments in the framework of the Standard Model.

Either there must be an extension to the Standard Model, or one of the experimental results must have a different explanation.

Cosmological data can provide an indirect but rather model-dependent bound to the mass of sterile neutrinos, such as the ms < 0.26 eV (0.44 eV) at 95% (99.9%) confidence limit given by Dodelson et al.[6] However, cosmological data can be accommodated within models with different assumptions, such as that by Gelmini et al.[7] MiniBooNE was designed to unambiguously verify or refute the LSND controversial result in a controlled environment.