http://www.newsweek.com/sterile-neutrino-elementary-particle-standard-model-particle-physics-956202

In the 1990s, the Liquid Scintillator Neutrino Detector (LSND) in Los Alamos, NM, found a weird anomaly during its experiments on tiny elementary particles called neutrinos. It found far more of a certain type than should have been possible.

Now, after years of controversy and conflicting results, an experiment called MiniBooNE at the Fermi National Accelerator Laboratory near Chicago appears to support the old LSND results. Researchers think it might be evidence of a long-fabled highly controversial elementary particle. The MiniBoone team recently uploaded their results to the academic preprint server arXiv.