Abstract
In the LSND experiment at the Los Alamos National Laboratory, a larger than expected [Formula: see text] signal was observed and interpreted as evidence of the oscillation [Formula: see text] with Δm2 in the range of 0.2–10 eV2. Since such a Δm2 range is incompatible with the widely accepted model of oscillations between three light neutrino species, and since there was no confirmation from other neutrino experiments, this finding became known as the "LSND anomaly". If true, it would require the existence of at least one "sterile" neutrino which calls the Standard Model of particle physics in a nontrivial way into question. This review discusses the current status of the "LSND anomaly", including the prospects of further experimental checks.
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