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

被引：5

作者：

Serebrov, A. P. ^{[1
]}

Ivochkin, V. G. ^{[1
]}

Samoilov, R. M. ^{[1
]}

Fomin, A. K. ^{[1
]}

Polyushkin, A. O. ^{[1
]}

Zinoviev, V. G. ^{[1
]}

Neustroev, P. V. ^{[1
]}

Golovtsov, V. L. ^{[1
]}

Chernyj, A. V. ^{[1
]}

Zherebtsov, O. M. ^{[1
]}

Chaikovskii, M. E. ^{[1
]}

Martemyanov, V. P. ^{[2
]}

Tarasenkov, V. G. ^{[2
]}

Aleshin, V. I. ^{[2
]}

Petelin, A. L. ^{[2
]}

Izhutov, A. L. ^{[3
]}

Tuzov, A. A. ^{[3
]}

Sazontov, S. A. ^{[3
]}

Gromov, M. O. ^{[3
]}

Afanasiev, V. V. ^{[3
]}

Zaytsev, M. E. ^{[1
,4
]}

Ryazanov, D. K. ^{[4
]}

机构：

[1] Kurchatov Inst, Natl Res Ctr, Petersburg Nucl Phys Inst, Gatchina 188300, Leningrad Oblas, Russia

[2] Kurchatov Inst, Natl Res Ctr, Moscow 123182, Russia

[3] Res Inst Atom Reactors, State Sci Ctr, Dimitrovgrad 433510, Russia

[4] Natl Res Nucl Univ MEPhI, Dimitrovgrad Engn & Tech Inst, Dimitrovgrad 433511, Russia

来源：

PHYSICS OF PARTICLES AND NUCLEI | 2018年 / 49卷 / 04期

基金：

俄罗斯基础研究基金会;

关键词：

Sterile Neutrino Search; Reactor Antineutrino; Full Scale Detector; Antineutrino Flux; Antineutrino Transition;

D O I：

10.1134/S1063779618040482

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

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 LaEurodependence fits to the 1/L (2) form with a statistical significance of 10% corresponding to 1.64 sigma, so that the measured spectrum deviates from the 1/L (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 eV(2)and 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.

引用

页码：701 / 708

页数：8

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