New Results of Measurements in the Neutrino-4 Experiment Devoted to Searches for Sterile Neutrinos

New results of measurements of the dependences of the flux of reactor antineutrinos and their spectrum on the distance from the center of the core of the SM-3 reactor (Dimitrovgrad, Russia) in the range from 6 to 12 m are presented. Additional measurements were conducted. The volume of accumulated e...

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Veröffentlicht in:Physics of atomic nuclei 2020-11, Vol.83 (6), p.930-936
Hauptverfasser: Serebrov, A. P., Ivochkin, V. G., Samoilov, R. M., Fomin, A. K., Zinoviev, V. G., Neustroev, P. V., Golovtsov, V. L., Chernyj, A. V., Zherebtsov, O. M., Chaikovskii, M. E., Petelin, A. L., Izhutov, A. L., Tuzov, A. A., Sazontov, S. A., Gromov, M. O., Afanasiev, V. V., Zaytsev, M. E., Gerasimov, A. A., Fedorov, V. V.
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Sprache:eng
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Zusammenfassung:New results of measurements of the dependences of the flux of reactor antineutrinos and their spectrum on the distance from the center of the core of the SM-3 reactor (Dimitrovgrad, Russia) in the range from 6 to 12 m are presented. Additional measurements were conducted. The volume of accumulated experimental data was increased nearly by a factor of two. A model-independent analysis was performed on the basis of all data in order to determine the oscillation parameters and . The method of a coherent summation of measurement results makes it possible to demonstrate directly the oscillation effect. We observed the oscillation effect at a level of three standard deviations ( ) in the vicinities of parameters values of eV and . Combining the results of the Neutrino-4 experiment with results for the gallium anomaly and for the reactor anomaly, we obtained the following value: .
ISSN:1063-7788
1562-692X
DOI:10.1134/S1063778820060265