Papers › Impact of Wave Packet Separation in Low-Energy Sterile Neutrino Searches
Impact of Wave Packet Separation in Low-Energy Sterile Neutrino Searches
Carlos A. Argüelles, Toni Bertólez-Martínez, Jordi Salvado
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Light sterile neutrinos have been motivated by anomalies observed in short-baseline neutrino experiments.Among them, radioactive-source and reactor experiments have provided evidence and constraints, respectively, for electron neutrino disappearance compatible with an eV-scale neutrino. The results from these observations are seemingly in conflict. This letter brings into focus the assumption that the neutrino wave packet can be approximated as a plane wave, which is adopted in all analyses of such experiments. We demonstrate that the damping of oscillations, e.g., due to a finite wave packet size, solve the tension between these electron-flavor observations and constraints.
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