Preparation of the Neutrino4+ Experiment at the SM-3 Reactor

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发表日期：

2024年12月1日

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A. P. Serebrov,
V. G. Ivochkin,
R. M. Samoilov,
A. K. Fomin,
V. G. Zinoviev,
A. V. Vassiljev,
S. S. Volkov,
V. L. Golovtsov,
N. V. Gruzinskii,
P. V. Neustroev,
V. V. Fedorov,
I. V. Parshin,
A. A. Gerasimov,
M. E. Zaytsev,
M. E. Chaikovskii,
A. M. Gagarskiy,
A. L. Petelin,
A. L. Izhutov,
M. O. Gromov,
S. A. Sazontov,
A. A. Tuzov,
V. I. Rykalin,
D. A. Makarenkov,
A. M. Nemeryuk,
T. E. Kuzmina

摘要

Abstract

Neutrino-4 experiment observed the effect of neutrino oscillation to a sterile state with 3 standard deviation confedence level. With the aim of a significant increase in the accuracy of the experiment, a second neutrino laboratory is created on the SM-3 reactor (Dimitrovgrad, Russia). The Neutrino-4 collaboration will improve the detector in the first neutrino laboratory also. Equipment for the new neutrino laboratory at the SM-3 reactor is prepared and installation is in progress. Main part of the improvement is a new scintillator with higher gadolinium concentration and doped with DIN to increase pulse shape discrimination abilities. Improvements will allow to increase statistical accuracy of the experiment by 2.7 times and to achieve confidence level of the sterile neutrino observation up to \(5\sigma\) .