Creation of a neutrino laboratory for search for sterile neutrino at SM-3 reactor

Serebrov, A. P.; Ivochkin, V. G.; Samoylov, R. M.; Fomin, A. K.; Zinoviev, V. G.; Neustroev, P.; Golovtsov, V.; Gruzinsky, N. V.; Solovey, V. A.; Cherniy, A. V.; Zherebtsov, O. M.; Martemyanov, V. P.; Zinoev, V. G.; Tarasenkov, V. G.; Aleshin, V. I.; Петелин, А. Л.; Павлов, С. В.; Izhutov, A. L.; Sazontov, S. A.; Ryazanov, D. K.; Gromov, M. O.; Afanasiev, V. V.; Matrosov, L. N.; Matrosova, M. Yu.

doi:10.48550/arxiv.1501.04740

Cited by 7 publications

(11 citation statements)

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“…In the near future, a number of ground-based experiments are planned, which are aimed at the search for sterile neutrinos 23,28,[35][36][37][38] . For example, two acceleration experiments were proposed, the results of which would allow to resolve, with a high degree of reliability, the problem of LSND anomaly.…”

Section: Discussionmentioning

confidence: 99%

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Sterile neutrinos influence on oscillation characteristics of active neutrinos at short distances in the generalized model of neutrino mixing

Khruschov

Фомичев

2019

Int. J. Mod. Phys. A

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A phenomenological model with active and sterile neutrinos is used for calculations of neutrino oscillation characteristics at the normal mass hierarchy of active neutrinos. Taking into account the contributions of sterile neutrinos, appearance and survival probabilities for active neutrinos are calculated. Modified graphical dependencies for the probability of appearance of electron neutrinos/antineutrinos in muon neutrino/antineutrino beams as a function of the ratio of the distance to the neutrino energy and other model parameters are obtained. It is shown that in the case of a certain type mixing between active and sterile neutrinos it is possible to clarify some features of the anomalies of neutrino data at short distances. A new parametrization for a particular type mixing matrix of active and sterile neutrinos that takes into account the additional sources of CP violation is used. The theoretical results obtained for mixing of active and sterile neutrinos can be applied for interpretation and prediction of results of ground-based experiments on search of sterile neutrinos as well as for the analysis of some astrophysical data.

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Section: Discussionmentioning

confidence: 99%

“…It is expected that in the coming several years it will be possible to confirm or deny the existence of such anomalies and light SNs (see, for example, Refs. 23,28,[35][36][37][38]. Besides, HN with masses from several keV to several TeV are often used to explain some astrophysical data 22,39,40 .…”

Section: Introductionmentioning

confidence: 99%

Sterile neutrinos influence on oscillation characteristics of active neutrinos at short distances in the generalized model of neutrino mixing

Khruschov

Фомичев

2019

Int. J. Mod. Phys. A

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“…Advantages of SМ-3 reactor are a compact reactor core (35×42×42 сm 3 ) with high reactor power being equal to 100 MW, as well as а sufficiently short distance (5 m) from the reactor core to the wall of an experimental hall. Besides, the fact of special significance is that an 3 antineutrino beam can be measured within a sufficiently wide range from 6 to 13 meters [3,4]. However, SM-3 reactor is at the Earth surface, hence cosmic background is the main difficulty with this experiment.…”

Section: Introductionmentioning

confidence: 99%

“…Most of these events are signals from muons stopped inside the detector and absorbed by nuclei with emission of 4 neutrons. Energy discrimination allows us to lower correlated event rate to 0.1s -1 [4,5]. Active shielding decreases background by another order of magnitude.…”

Section: Introductionmentioning

confidence: 99%

Neutrino-4 experiment on search for sterile neutrino with multi-section model of detector

Serebrov¹,

Ivochkin²,

Samoilov³

et al. 2017

J. Phys.: Conf. Ser.

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In order to carry out research in the field of possible existence of a sterile neutrino the laboratory based on SМ-3 reactor (Dimitrovgrad, Russia) was created to search for oscillations of reactor antineutrino. The prototype of a multi-section neutrino detector with liquid scintillator volume of 350 l was installed in the middle of 2015. It is a moveable inside the passive shielding detector, which can be set at distance range from 6 to 11 meters from the reactor core. Measurements of antineutrino flux at such small distances from the reactor core are carried out with moveable detector for the first time. The measurements carried out with detector prototype demonstrated a possibility of measuring a reactor antineutrino flux in difficult conditions of cosmic background at Earth surface. * serebrov@pnpi.spb.ru

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“…Due to some peculiar characteristics of its construction, reactor SM-3 provides the most favorable conditions for conducting the experiment [3][4][5][6]. It has the most compact active zone 35x42x42cm and power 90 MW.…”

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confidence: 99%

Status of Experiment NEUTRINO-4 Search for Sterile Neutrino

Serebrov

Ivochkin

Samoilov

et al. 2017

J. Phys.: Conf. Ser.

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The experiment "Neutrino-4" started in 2014 on a model, then it was continued on a full-scale detector, and now, has provided the measurement result on dependence of the flux and spectrum of reactor antineutrinos on the distance of 6 -12 meters from the center of the reactor. One of the main problems is the correlated background from fast neutrons caused by space radiation. Attempts to suppress the background of fast neutrons by sectioning the detector have given some result. The relation of signal/background has improved up to 0.6. As a result, measurements of the difference in the counting rate of neutrino-like events (reactor ON-reactor OFF) have been obtained as dependence on distance from the reactor center. The fit of experimental dependence with the law 2 1/ L give satisfactory result.The goodness of that fit is 81%. However, there was discovered experimental neutrino spectrum difference from calculated one. With achieved accuracy this difference does not change with distance. Therefore it cannot be interpreted as oscillations. Calculated spectrum form correction for experimental allow us to make proper analysis of oscillation parameters 2 14 m  and 2 14 sin (2 )  limitations. Result of this analysis is exclusion of reactor and gallium anomalies area with 95% CL. Experiment future perspectives are discussed.

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Creation of a neutrino laboratory for search for sterile neutrino at SM-3 reactor

Cited by 7 publications

References 0 publications

Sterile neutrinos influence on oscillation characteristics of active neutrinos at short distances in the generalized model of neutrino mixing

Sterile neutrinos influence on oscillation characteristics of active neutrinos at short distances in the generalized model of neutrino mixing

Neutrino-4 experiment on search for sterile neutrino with multi-section model of detector

Status of Experiment NEUTRINO-4 Search for Sterile Neutrino

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