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Search for sterile neutrinos in the neutrino-4 experiment |
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| Authors: | A. P. Serebrov V. G. Ivochkin R. M. Samoilov A. K. Fomin A. O. Polyushkin V. G. Zinov’ev P. V. Neustroev V. L. Golovtsov A. V. Chernyi O. M. Zherebtsov V. P. Martem’yanov V. G. Tarasenkov V. I. Aleshin A. L. Petelin A. L. Izhutov A. A. Tuzov S. A. Sazontov D. K. Ryazanov M. O. Gromov V. V. Afanas’ev M. E. Zaitsev M. E. Chaikovskii |
| Affiliation: | 1.Petersburg Nuclear Physics Institute,National Research Center Kurchatov Institute,Gatchina, Leningrad region,Russia;2.National Research Center Kurchatov Institute,Moscow,Russia;3.State Scientific Center Research Institute of Atomic Reactors,Dimitrovgrad, Ul’yanovsk region,Russia;4.Dimitrovgrad Engineering and Technical Institute, National Research Nuclear University MEPhI,Dimitrovgrad, Ul’yanovsk region,Russia |
| Abstract: | An experimental search for sterile neutrinos has been carried out at a neutrino facility based on the SM-3 nuclear reactor in Dimitrovgrad, Russia. The movable detector with passive shielding against the external radiation may be positioned at a distance varying between 6 and 12 m from the center of the reactor. The antineutrino flux has for the first time been measured using a movable detector placed close to the antineutrino source. The accuracy of the measurements is largely restricted by the cosmic background. The results of the measurements performed at small and large distances are analyzed in terms of the sterile-neutrino model parameters Δm 14 2 and sin22θ14. |
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