Reply to Comment on “Analysis of the Results of the Neutrino-4 Experiment on the Search for the Sterile Neutrino and Comparison with Results of Other Experiments” (JETP Letters 112, 199 (2020))

Serebrov, A. P.; Samoilov, R. M.

doi:10.1134/s0021364020190108

Cited by 7 publications

(8 citation statements)

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“…The results of these experiments provide intriguing evidence in favor of the "3 + 1" scenario, although they appear to be in deep conflict with each other. In the two consecutive analyses of the Neutrino-4 data [88,89] (eprint version 7), the following allowed values for the masssquared splitting and mixing angle were obtained by using the so-called coherent data summation method: These results do not agree with the constraints based on the combined analysis of the MINOS, Daya Bay, and Bugey-3 data [94], and with the limits obtained in the recent SBL experiments DANSS [95][96][97], STEREO [51], NEOS [78] (see also [98], and PROSPECT [53]; this issue is now broadly discussed in the literature [99][100][101][102][103]. On the other hand, the 68% C.L.…”

Section: Extra Neutrinos or Miscalculated Flux?mentioning

confidence: 90%

“…We verified that the two representations of the Neutrino-4 data sample (with three and four points) yield the same (within the specified precision) result in our analysis and so we will no longer dwell on this issue. Recall that we do not take up the intriguing results of the spectral Neutrino-4 measurements, (see [99][100][101][102][103] for the comments and authors' responses) arbitrarily assuming that the integral event rate is not related to the sterile neutrinos.…”

Section: The Main Datasetmentioning

confidence: 99%

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Reactor Antineutrino Anomaly Reanalysis in Context of Inverse-Square Law Violation

Naumov

Shkirmanov

2021

Universe

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We discuss a possibility that the so-called reactor antineutrino anomaly (RAA), which is a deficit of the ν¯e rates in the reactor experiments in comparison to the theoretical expectations, can at least in part be explained by applying a quantum field-theoretical approach to neutrino oscillations, which in particular predicts a small deviation from the classical inverse-square law at short (but still macroscopic) distances between the neutrino source and detector. An extensive statistical analysis of the current reactor data on the integrated ν¯e event rates vs. baseline is performed to examine this speculation. The obtained results are applied to study another long-standing puzzle—gallium neutrino anomaly (GNA), which is a missing νe flux from 37Ar and 51Cr electron-capture decays as measured by the gallium–germanium solar neutrino detectors GALLEX and SAGE.

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Section: Extra Neutrinos or Miscalculated Flux?mentioning

confidence: 90%

Section: The Main Datasetmentioning

confidence: 99%

Reactor Antineutrino Anomaly Reanalysis in Context of Inverse-Square Law Violation

Naumov

Shkirmanov

2021

Universe

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“…The Neutrino-4 experiment claimed an observation of ˜ oscillations to sterile neutrinos although the significance of the result was only 2.8 [15,16] and there were concerns about the validity of their analysis [17][18][19][20]. Neutrino-4 replied to these critical comments [21,22] and later agreed with two of them [23]. This resulted in the reduction of the significance of the result by about 0.5 .…”

Section: Introductionmentioning

confidence: 99%

New results from the DANSS experiment

Danilov¹,

Skrobova²

2022

Proceedings of the European Physical Society Conference on High Energy Physics — PoS(EPS-HEP2021)

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The DANSS experiment collected 5.5 million Inverse Beta Decay (IBD) events during 5 years of operation. Data were collected at 3 distances (10.9 m, 11.9 m, and 12.9 m) from the center of the core of the industrial 3.1reactor. The IBD event rate exceeds 5000/day at the smallest distance. The detector position was changed usually 3 times a week. Therefore in the analysis that uses information only about relative IBD counting rates and changes in positron energy spectra shapes many systematic uncertainties were canceled out. No statistically significant evidence for sterile neutrinos is found. The significance of the best-fit point in the 4 case is only 1.3 . The excluded area covers a very interesting range of the sterile neutrino parameters up to 2 2 < 0.008 in the most sensitive region. The IBD rate dependence on the fission fraction of 239 Pu was measured. It agrees with predictions of the Huber-Mueller model. The reactor power was measured during more than 4 years with ≈ 2% accuracy in 2 days using the rate of neutrino events normalized to the thermal power at the initial period.

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“…The Neutrino-4 experiment claimed an observation of νe oscillations to sterile neutrinos although the significance of the result was only 2.8σ [15,16] and there were concerns about the validity of their analysis [17,18,19,20]. Neutrino-4 replied to these critical comments [21,22] and later agreed with two of them [23]. This resulted in the reduction of the significance of the result by about 0.5σ .…”

Section: Introductionmentioning

confidence: 99%

New results from the DANSS experiment

Danilov¹,

Skrobova²

2021

Preprint

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The DANSS experiment collected 5.5 million Inverse Beta Decay (IBD) events during 5 years of operation. Data were collected at 3 distances (10.9 m, 11.9 m, and 12.9 m) from the center of the core of the industrial 3.1 GW reactor. The IBD event rate exceeds 5000/day at the smallest distance. The detector position was changed usually 3 times a week. Therefore in the analysis that uses information only about relative IBD counting rates and changes in positron energy spectra shapes many systematic uncertainties were canceled out. No statistically significant evidence for sterile neutrinos is found. The significance of the best-fit point in the 4ν case is only 1.3σ . The excluded area covers a very interesting range of the sterile neutrino parameters up to sin 2 2θ ee < 0.008 in the most sensitive region. The IBD rate dependence on the fission fraction of 239 Pu was measured. It agrees with predictions of the Huber-Mueller model. The reactor power was measured during more than 4 years with ≈ 2% accuracy in 2 days using the rate of neutrino events normalized to the thermal power at the initial period. *** The European Physical Society Conference on High Energy Physics (EPS-HEP2021), *** ** 26-30 July 2021 *** ** Online conference, jointly organized by Universität Hamburg and the research center DESY *** * Speaker.

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Reply to Comment on “Analysis of the Results of the Neutrino-4 Experiment on the Search for the Sterile Neutrino and Comparison with Results of Other Experiments” (JETP Letters 112, 199 (2020))

Cited by 7 publications

References 1 publication

Reactor Antineutrino Anomaly Reanalysis in Context of Inverse-Square Law Violation

Reactor Antineutrino Anomaly Reanalysis in Context of Inverse-Square Law Violation

New results from the DANSS experiment

New results from the DANSS experiment

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