On the possibility of performing an experiment in the search for a sterile neutrino

Serebrov, A. P.; Fomin, A. K.; Zinoviev, V. G.; Ivochkin, V. G.; Loginov, Yu.E.; Petrov, G. A.; Solovey, V. A.; Chernyi, A. V.; Zherebtsov, O. M.; Samoylov, R. M.; Martemyanov, V. P.; Tsinoev, V. G.; Tarasenkov, V. G.; Aleshin, V. I.; Петелин, А. Л.; Павлов, С. В.; Svyatkin, M. N.; Izhutov, A. L.; Sazontov, S. A.; Ryazanov, D. K.; Gromov, M. O.; Afanasiev, V. V.; Rykalin, V.I.

doi:10.1134/s106378501406011x

Cited by 15 publications

(6 citation statements)

References 3 publications

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“…120, 191801 (2018) [1]; speaker: B. Fornal. † e-mail: bfornal@ucsd.edu ‡ e-mail: bgrinstein@ucsd.edu bottle result quoted by the PDG and based on five experiments [6][7][8][9][10] is…”

Section: Neutron Lifetime Discrepancymentioning

confidence: 99%

Dark side of the neutron?

Fornal

Grinstein

2019

EPJ Web Conf.

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We discuss our recently proposed interpretation of the discrepancy between the bottle and beam neutron lifetime experiments as a sign of a dark sector. The difference between the outcomes of the two types of measurements is explained by the existence of a neutron dark decay channel with a branching fraction 1%. Phenomenologically consistent particle physics models for the neutron dark decay can be constructed and they involve a strongly self-interacting dark sector. We elaborate on the theoretical developments around this idea and describe the efforts undertaken to verify it experimentally.

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“…120, 191801 (2018) [1]; speaker: B. Fornal. † e-mail: bfornal@ucsd.edu ‡ e-mail: bgrinstein@ucsd.edu bottle result quoted by the PDG and based on five experiments [6][7][8][9][10] is…”

Section: Neutron Lifetime Discrepancymentioning

confidence: 99%

Dark side of the neutron?

Fornal

Grinstein

2019

EPJ Web Conf.

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“…The Neutrino-4 experiment started in 2014, at first on a model, then on a full-scale detector and, for the first time in the world, has provided measurement data on dependence of the reactor antineutrinos flux on the distance within 6 -12 meters [17][18][19][20]. Attempts to suppress the background of fast neutrons by means of sectioning the detector has given the required result.…”

Section: Conclusion On the Current Experimental Resultsmentioning

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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“…Starting from the pioneer Russian experiments of L. Mikaelyan group with RONS facility [32], physicists of several countries apply their efforts to build a compact detector of reactor neutrino. Some of them are aimed at monitoring of an industrial reactor (SONGS [33], Nucifer [34], ANGRA [35], CORMORAD [36], PANDA [37], WATCHMAN [38]), whereas others are intended for short-range neutrino oscillations only (NEUTRINO4 [39], STEREO [40], POSEIDON [41]) or combine the above goals (HANARO/NEOS [42], NuLat [43], SoLid [44], PROSPECT [45], ASDC [46]). Big underground neutrino detectors are planned to be equipped with artificial radioactive source (SOX [47], CeLAND [48]).…”

Section: Estimated "Sterile" Sensitivity Of Danssmentioning

confidence: 99%

DANSS: Detector of the reactor AntiNeutrino based on Solid Scintillator

et al. 2016

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The DANSS project is aimed at creating a relatively compact neutrino spectrometer which does not contain any flammable or other dangerous liquids and may therefore be located very close to the core of an industrial power reactor. As a result, it is expected that high neutrino flux would provide about 15,000 IBD interactions per day in the detector with a sensitive volume of 1 m 3 . High segmentation of the plastic scintillator will allow to suppress a background down to a ∼1% level. Numerous tests performed with a simplified pilot prototype DANSSino under a 3 GW th reactor of the Kalinin NPP have demonstrated operability of the chosen design.The DANSS detector surrounded with a composite shield is movable by means of a special lifting gear, varying the distance to the reactor core in a range from 10 m to 12 m. Due to this feature, it could be used not only for the reactor monitoring, but also for fundamental research including short-range neutrino oscillations to the sterile state. Supposing one-year measurement, the sensitivity to the oscillation parameters is expected to reach a level of sin 2 (2θnew) ∼ 5 × 10 −3 with ∆m 2 ⊂ (0.02 − 5.0) eV 2 .

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On the possibility of performing an experiment in the search for a sterile neutrino

Cited by 15 publications

References 3 publications

Dark side of the neutron?

Dark side of the neutron?

Status of Experiment NEUTRINO-4 Search for Sterile Neutrino

DANSS: Detector of the reactor AntiNeutrino based on Solid Scintillator

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