Status of Experiment NEUTRINO-4 Search for Sterile Neutrino

Serebrov, A. P.; Ivochkin, V. G.; Samoilov, R. M.; Fomin, A. K.; Polyushkin, A. O.; Zinoviev, V. G.; Neustroev, P.; Golovtsov, V.; Chernyj, A. V.; Zherebtsov, O. M.; Martemyanov, V. P.; Tarasenkov, V. G.; Aleshin, V. I.; Петелин, А. Л.; Izhutov, A. L.; Tuzov, A. A.; Sazontov, S. A.; Ryazanov, D. K.; Gromov, M.; Afanasiev, V. V.; Zaytsev, M. E.; Chaikovskii, M. E.

doi:10.1088/1742-6596/798/1/012116

Cited by 7 publications

(14 citation statements)

References 31 publications

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“…Before discussing our results, let us point out that the determination of the sensitivity to sterile neutrinos from oscillations is non-trivial from the statistical point of view. In particular, the results obtained under the assumption that Wilks' theorem [95] applies may differ from the ones obtained via Monte Carlo simulation [43,[96][97][98]. The sensitivity contours in this work have however been computed under the assumption that Wilks' theorem applies, in order to ease the comparison with previous literature.…”

Section: Sterile Neutrinosmentioning

confidence: 98%

New physics from oscillations at the DUNE near detector, and the role of systematic uncertainties

Coloma

López‐Pavón

Rosauro-Alcaraz

et al. 2021

J. High Energ. Phys.

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We study the capabilities of the DUNE near detector to probe deviations from unitarity of the leptonic mixing matrix, the 3+1 sterile formalism and Non-Standard Interactions affecting neutrino production and detection. We clarify the relation and possible mappings among the three formalisms at short-baseline experiments, and we add to current analyses in the literature the study of the νμ→ ντ appearance channel. We study in detail the impact of spectral uncertainties on the sensitivity to new physics using the DUNE near detector, which has been widely overlooked in the literature. Our analysis shows that this plays an important role on the results and, in particular, that it can lead to a strong reduction in the sensitivity to sterile neutrinos from νμ→ νe transitions, by more than two orders of magnitude. This stresses the importance of a joint experimental and theoretical effort to improve our understanding of neutrino nucleus cross sections, as well as hadron production uncertainties and beam focusing effects. Nevertheless, even with our conservative and more realistic implementation of systematic uncertainties, we find that an improvement over current bounds in the new physics frameworks considered is generally expected if spectral uncertainties are below the 5% level.

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Section: Sterile Neutrinosmentioning

confidence: 98%

New physics from oscillations at the DUNE near detector, and the role of systematic uncertainties

Coloma

López‐Pavón

Rosauro-Alcaraz

et al. 2021

J. High Energ. Phys.

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“…This is a range of oscillation lengths which can be explored in a model independent way in the new short-baseline reactor neutrino experiments (DANSS [98], Neutrino-4 [54], PROSPECT [99], SoLid [100], STEREO [101]) and in the SOX [102] and BEST [103] radioactive source experiments by measuring the reactor antineutrino rate as a function of distance. However, they will need to be sensitive to small oscillations with the amplitude 0.022 (0.0050) sin 2 2ϑ ee 0.19 (0.23) at 2σ (3σ).…”

Section: Global ν E Andν E Disappearancementioning

confidence: 99%

“…We do not consider the still preliminary data of the Neutrino-4 experiment[54] 3. We also correct, inTable 1, the misprints of the Rovno88 correlations in Tab.…”

mentioning

confidence: 97%

Updated global 3+1 analysis of short-baseline neutrino oscillations

Gariazzo

Giunti

Laveder

et al. 2017

J. High Energ. Phys.

267

335

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We present the results of an updated fit of short-baseline neutrino oscillation data in the framework of 3+1 active-sterile neutrino mixing. We first consider ν e andν e disappearance in the light of the Gallium and reactor anomalies. We discuss the implications of the recent measurement of the reactorν e spectrum in the NEOS experiment, which shifts the allowed regions of the parameter space towards smaller values of |U e4 | 2 . The β-decay constraints of the Mainz and Troitsk experiments allow us to limit the oscillation length between about 2 cm and 7 m at 3σ for neutrinos with an energy of 1 MeV. The corresponding oscillations can be discovered in a model-independent way in ongoing reactor and source experiments by measuring ν e andν e disappearance as a function of distance. We then consider the global fit of the data on short-baselinetransitions in the light of the LSND anomaly, taking into account the constraints from ν µ disappearance experiments, including the recent data of the MINOS and IceCube experiments. The combination of the NEOS constraints on |U e4 | 2 and the MINOS and IceCube constraints on |U µ4 | 2 lead to an unacceptable appearance-disappearance tension which becomes tolerable only in a pragmatic fit which neglects the MiniBooNE low-energy anomaly. The minimization of the global χ 2 in the space of the four mixing parameters Open Access, c The Authors. Article funded by SCOAP 3 .https://doi.org/10.1007/JHEP06 (2017)135 JHEP06 (2017)135 ∆m 2 41 , |U e4 | 2 , |U µ4 | 2 , and |U τ 4 | 2 leads to three allowed regions with narrow ∆m 2 41 widths at ∆m 2 41 ≈ 1.7 (best-fit), 1.3 (at 2σ), 2.4 (at 3σ) eV 2 . The effective amplitude of short-baselineν e oscillations is limited by 0.00048 sin 2 2ϑ eµ 0.0020 at 3σ. The restrictions of the allowed regions of the mixing parameters with respect to our previous global fits are mainly due to the NEOS constraints. We present a comparison of the allowed regions of the mixing parameters with the sensitivities of ongoing experiments, which show that it is likely that these experiments will determine in a definitive way if the reactor, Gallium and LSND anomalies are due to active-sterile neutrino oscillations or not.

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“…This and other anomalies found in neutrino oscillation experiments could be explained by a light sterile neutrino. Serebrov et al just reported on the first ever measurements with moving NEUTRINO-4 detector at the SM-3 reactor [61]. First results of the STEREO experiment at the ILL are expected for 2017 [62].…”

Section: Fundamental Neutron Physicsmentioning

confidence: 97%

Cold and Ultra-cold Neutrons as Probes of New Physics

Konrad¹,

Abele²

2017

Proceedings of the 26th International Nuclear Physics Conference — PoS(INPC2016)

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Despite the great success of the Standard Model, many key questions in particle physics, astrophysics, and cosmology are unanswered. In particular, more than 95 % of the universe consists of unknown dark matter and dark energy. Today, a major goal of particle physics is to look for evidence of new physics beyond the Standard Model. Collider searches for new physics are well suited to the direct production of new high-mass particles, whereas low-energy precision experiments search for traces that new particles leave in known processes. Direct and indirect evidence of new physics are highly complementary. High-precision experiments with extremely slow, cold and ultra-cold neutrons address some of the unanswered questions, for instance, on the nature of the fundamental forces and underlying symmetries, the origin, evolution, and fate of the universe, or on the nature of the gravitational force at very small distances. For example, the limit on the electric dipole moment of the neutron constrains the CP violating phases, the lifetime of the neutron determines the relative helium abundance in the universe, and neutrons bouncing over a mirror probe dark matter and dark energy. New facilities and technological developments now give window for significant improvement in precision by one to two orders of magnitude. In this paper, we will give an overview of current and planned facilities and experiments, as well as an overview of some of the applications of neutrons to astrophysics, cosmology, and physics beyond the Standard Model.

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Status of Experiment NEUTRINO-4 Search for Sterile Neutrino

Cited by 7 publications

References 31 publications

New physics from oscillations at the DUNE near detector, and the role of systematic uncertainties

New physics from oscillations at the DUNE near detector, and the role of systematic uncertainties

Updated global 3+1 analysis of short-baseline neutrino oscillations

Cold and Ultra-cold Neutrons as Probes of New Physics

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