DANSS: Detector of the reactor AntiNeutrino based on Solid Scintillator

Alekseev, I.; Belov, V.; Brudanin, V.; Danilov, M.; Egorov, V.; Filosofov, D.; Fomina, M.; Hons, Z.; Kazartsev, S.; Kobyakin, A. S.; Kuznetsov, A. N.; Machikhiliyan, I. V.; Medvedev, D. V.; Nesterov, V. M.; Оlshevsky, А.G.; Ponomarev, Dmitry; Rozova, I.; Rumyantseva, N.; Rusinov, V.; Salamatin, A. V.; Shevchik, E.; Shirchenko, M.; Shitov, Yu.; Skrobova, N.; Старостин, А. С.; Svirida, D. N.; Tarkovsky, E.; Tikhomirov, I.; Vlasek, J.; Zhitnikov, I.; Zinatulina, D.

doi:10.1088/1748-0221/11/11/p11011

Cited by 105 publications

(60 citation statements)

References 55 publications

(73 reference statements)

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“…2. Daya Bay [25], as well as the short-baseline reactor experiments NEOS [26] and DANSS [27,28] have presented new limits on sterile neutrino oscillations in the relevant parameter region. These new analyses rely on relative comparisons of measured spectra at different baselines and are therefore independent of flux predictions.…”

Section: Introductionmentioning

confidence: 99%

Sterile neutrinos or flux uncertainties? — Status of the reactor anti-neutrino anomaly

Dentler

Hernández-Cabezudo

Kopp

et al. 2017

J. High Energ. Phys.

102

111

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The ∼ 3σ discrepancy between the predicted and observed reactor antineutrino flux, known as the reactor anti-neutrino anomaly, continues to intrigue. The recent discovery of an unexpected bump in the reactor anti-neutrino spectrum, as well as indications that the flux deficit is different for different fission isotopes seems to disfavour the explanation of the anomaly in terms of sterile neutrino oscillations. We critically review this conclusion in view of all available data on electron (anti)neutrino disappearance. We find that the sterile neutrino hypothesis cannot be rejected based on global data and is only mildly disfavored compared to an individual rescaling of neutrino fluxes from different fission isotopes. The main reason for this is the presence of spectral features in recent data from the NEOS and DANSS experiments. If state-of-the-art predictions for reactor fluxes are taken at face value, sterile neutrino oscillations allow a consistent description of global data with a significance close to 3σ relative to the no-oscillation case. Even if reactor fluxes and spectra are left free in the fit, a 2σ hint in favour of sterile neutrinos remains, with allowed parameter regions consistent with an explanation of the anomaly in terms of oscillations.

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Section: Introductionmentioning

confidence: 99%

Sterile neutrinos or flux uncertainties? — Status of the reactor anti-neutrino anomaly

Dentler

Hernández-Cabezudo

Kopp

et al. 2017

J. High Energ. Phys.

102

111

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“…The DANSS detector [16] is a highly segmented plastic scintillator detector with a total volume of 1 m 3 , surrounded with a composite shield. It consists of 2.5 thousand scintillator strips (1 × 4 × 100 cm 3 ) with a thin (∼ 0.2 mm) Gd-containing surface coating.…”

Section: The Danss Experimentsmentioning

confidence: 99%

Searches for sterile neutrinos at very short baseline reactor experiments

Danilov

2019

J. Phys.: Conf. Ser.

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For a long time there were 3 main experimental indications in favor of the existence of sterile neutrinos:νe appearance in theνµ beam in the LSND experiment,νe flux deficit in comparison with theoretical expectations in reactor experiments, and νe deficit in calibration runs with radioactive sources in the Ga solar neutrino experiments SAGE and GALEX. All three problems can be explained by the existence of sterile neutrinos with the mass square difference in the ballpark of 1 eV 2 . Recently the MiniBooNE collaboration observed electron (anti)neutrino appearance in the muon (anti)neutrino beams. The significance of the effect reaches 6.0σ level when combined with the LSND result. Even more recently the NEUTRINO-4 collaboration claimed the observation ofνe oscillations to sterile neutrinos with a significance slightly higher than 3σ. If these results are confirmed, New Physics beyond the Standard Model would be required. More than 10 experiments are devoted to searches of sterile neutrinos. Six very short baseline reactor experiments are taking data just now. We review the present results and perspectives of these experiments.

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“…2 It should be noted that the previously known reactor neutrino anomaly [7] may not require any explanation in terms of light sterile neutrinos in view of the recent paper from the Daya Bay collaboration [8]. However, other experiments such as NEOS [9] and DANSS [10] still suggest the presence of this reactor neutrino anomaly. For a global analysis of these SBL results we suggest the reader to look at Ref.…”

Section: Introductionmentioning

confidence: 97%

Constraints on a sub-eV scale sterile neutrino from nonoscillation measurements

2018

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Anomalies in several short-baseline neutrino oscillation experiments suggest the possible existence of sterile neutrinos at about eV scale having appreciable mixing with the already known three neutrinos. We find that if such a light sterile neutrino exists, through a combined study of the leptonic decays of µ − , τ − , π − and K − , some semi-leptonic decays of τ − and the invisible decay width of the Z boson, it is possible to constrain the relevant mixing matrix elements. Furthermore, we compare the constraints, derived by using the method presented here, with the experimental results obtained from short-baseline neutrino oscillation experiments. We find that a single light sterile neutrino cannot satisfy the existing short-baseline neutrino oscillation constraints and explain the anomalies mentioned above. Along the way we provide a number of experimentally clean observables which can be used to directly study the light sterile neutrino independently of the neutrino oscillation experiments.

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DANSS: Detector of the reactor AntiNeutrino based on Solid Scintillator

Cited by 105 publications

References 55 publications

Sterile neutrinos or flux uncertainties? — Status of the reactor anti-neutrino anomaly

Sterile neutrinos or flux uncertainties? — Status of the reactor anti-neutrino anomaly

Searches for sterile neutrinos at very short baseline reactor experiments

Constraints on a sub-eV scale sterile neutrino from nonoscillation measurements

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