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Sterile Neutrino Search in the Neutrino-4 Experiment at the SM-3 Reactor

Serebrov, A. ; Ivochkin, V. ; Samoilov, R. ; Fomin, A. ; Polyushkin, A. ; Zinoviev, V. ; Neustroev, P. ; Golovtsov, V. ; Chernyj, A. ; Zherebtsov, O. ; Chaikovskii, M. ; Martemyanov, V. ; Tarasenkov, V. ; Aleshin, V. ; Petelin, A. ; Izhutov, A. ; Tuzov, A. ; Sazontov, S. ; Gromov, M. ; Afanasiev, V. ; Zaytsev, M. ; Ryazanov, D.

Physics of Particles and Nuclei, 2018, Vol.49(4), pp.701-708 [Periódico revisado por pares]

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  • Título:
    Sterile Neutrino Search in the Neutrino-4 Experiment at the SM-3 Reactor
  • Autor: Serebrov, A. ; Ivochkin, V. ; Samoilov, R. ; Fomin, A. ; Polyushkin, A. ; Zinoviev, V. ; Neustroev, P. ; Golovtsov, V. ; Chernyj, A. ; Zherebtsov, O. ; Chaikovskii, M. ; Martemyanov, V. ; Tarasenkov, V. ; Aleshin, V. ; Petelin, A. ; Izhutov, A. ; Tuzov, A. ; Sazontov, S. ; Gromov, M. ; Afanasiev, V. ; Zaytsev, M. ; Ryazanov, D.
  • Assuntos: Nuclear Physics ; Nuclear Reactors ; Research Institutes ; Nuclear Facilities
  • É parte de: Physics of Particles and Nuclei, 2018, Vol.49(4), pp.701-708
  • Descrição: To access, purchase, authenticate, or subscribe to the full-text of this article, please visit this link: http://dx.doi.org/10.1134/S1063779618040482 Byline: A. P. Serebrov (1), V. G. Ivochkin (1), R. M. Samoilov (1), A. K. Fomin (1), A. O. Polyushkin (1), V. G. Zinoviev (1), P. V. Neustroev (1), V. L. Golovtsov (1), A. V. Chernyj (1), O. M. Zherebtsov (1), M. E. Chaikovskii (1), V. P. Martemyanov (2), V. G. Tarasenkov (2), V. I. Aleshin (2), A. L. Petelin (2), A. L. Izhutov (3), A. A. Tuzov (3), S. A. Sazontov (3), M. O. Gromov (3), V. V. Afanasiev (3), M. E. Zaytsev (1,4), D. K. Ryazanov (4) Abstract: Abstract First results on the energy spectrum and flux of reactor antineutrinos as a function of the distance L from the reactor core, measured in the Neutrino-4 experiment for 6 < L < 12 m, are presented. The flux Ladependence fits to the 1/L .sup.2 form with a statistical significance of ~10% corresponding to 1.64[sigma], so that the measured spectrum deviates from the 1/L .sup.2 law at a confidence level ~90%. The measured energy spectrum deviates from the predicted one at a similar confidence level ~90%. That both deviations are best described with oscillation parameters in the same regions of [DELTA] m.sub.14.sup.2 0.7-0.8 e[V.sup.2]and .sup.22 .sub.14 0.10-0.15 boosts the overall confidence level to ~95% (2[sigma]). These results suggest that antineutrinos oscillate to a sterile state, but still fall short of reliably establishing the oscillation phenomenon. At present, the possibility of mimicking the oscillation effect by systematic errors cannot be completely excluded. Author Affiliation: (1) 0000 0004 0619 3376, grid.430219.d, Petersburg Nuclear Physics Institute, National Research Center Kurchatov Institute, 188300, Gatchina, Leningrad oblast, Russia (2) 0000000406204151, grid.18919.38, National Research Center Kurchatov Institute, 123182, Moscow, Russia (3) State Scientific Center Research Institute of Atomic Reactors, 433510, Dimitrovgrad, Russia (4) Dimitrovgrad Engineering and Technical Institute, National Research Nuclear University MEPhI, 433511, Dimitrovgrad, Russia Article History: Registration Date: 01/01/2018 Online Date: 11/07/2018
  • Idioma: Inglês

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