Neutrino masses are usually described by adding to the Standard Model some SU(2)singlet fermions that have the Yukawa couplings, as well as some Majorana mass terms. The number of such fields and the scales of their Majorana masses are not known. Several independent observations point to the possibility that some of these singlets may have masses well below the electroweak scale. A sterile neut...

Abstract We review the status of light sterile neutrino searches, motivated by original Short BaseLine (SBL) anomalies. Here, we discuss how properties can be constrained different types oscillation experiments (considering appearance or disappearance probes in channels) and non-oscillation measurements. These latter include aiming at obtaining a value for absolute scale masses (β decay probes)...