Model-Independent ${\bar{\nu }}_e$ Short-Baseline Oscillations from Reactor Spectral Ratios

Abstract

We consider the ratio of the spectra measured in the DANSS neutrino experiment at 12.7 and 10.7~m from a nuclear reactor. These data give a new model-independent indication in favor of short-baseline ${\bar{\nu }}_e$ oscillations which reinforce the model-independent indication found in the late 2016 in the NEOS experiment. The combined analysis of the NEOS and DANSS spectral ratios in the framework of 3+1 active-sterile neutrino mixing favor short-baseline ${\bar{\nu }}_e$ oscillations with a statistical significance of $3.7\sigma$. The two mixing parameters ${\sin }^{2}2{\vartheta }_{ee}$ and $\Delta m_{41}^2$ are constrained at $2\sigma$ in a narrow-$\Delta m_{41}^2$ island at $\Delta m_{41}^2\simeq 1.3{\text{eV}}^2$, with ${\sin }^{2}2{\vartheta }_{ee}=0.049\pm 0.023$ ($2\sigma$). We discuss the implications of the model-independent NEOS+DANSS analysis for the reactor and Gallium anomalies. The NEOS+DANSS model-independent determination of short-baseline ${\bar{\nu }}_e$ oscillations allows us to analyze the reactor rates without assumptions on the values of the main reactor antineutrino fluxes and the data of the Gallium source experiments with free detector efficiencies. The corrections to the reactor neutrino fluxes and the Gallium detector efficiencies are obtained from the fit of the data. In particular, we confirm the indication in favor of the need for a recalculation of the ${}^{235}\text{U}$ reactor antineutrino flux found in previous studies assuming the absence of neutrino oscillations.

arXiv comment10 pages; analysis improved by taking into account the uncertainties of the reactor fission fractions

References in corpus (41)

• Evidence for Neutrino Oscillations from the Observation of Electron Anti-neutrinos in a Muon Anti-Neutrino Beam
• The Reactor Antineutrino Anomaly
• Improved Predictions of Reactor Antineutrino Spectra
• Search for neutrino oscillations on a long base-line at the CHOOZ nuclear power station
• On the determination of anti-neutrino spectra from nuclear reactors
• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Reanalysis of the GALLEX solar neutrino flux and source experiments
• Statistical Significance of the Gallium Anomaly
• Results from the Palo Verde Neutrino Oscillation Experiment
• Sterile neutrino search at NEOS Experiment
• Global constraints on absolute neutrino masses and their ordering
• Measurement of the response of a gallium metal solar neutrino experiment to neutrinos from a 51Cr source
• Are there sterile neutrinos at the eV scale?
• Observation of Energy and Baseline Dependent Reactor Antineutrino Disappearance in the RENO Experiment
• Evolution of the Reactor Antineutrino Flux and Spectrum at Daya Bay
• Neutrino mass spectrum from the results of neutrino oscillation experiments
• Pragmatic View of Short-Baseline Neutrino Oscillations
• Limits on nu_e and anti-nu_e disappearance from Gallium and reactor experiments
• Update of Short-Baseline Electron Neutrino and Antineutrino Disappearance
• 3+1 and 3+2 Sterile Neutrino Fits
• Neutrino Flux Predictions for the NuMI Beam
• A sterile neutrino scenario constrained by experiments and cosmology
• Reactor Neutrino Spectra
• Testing the statistical compatibility of independent data sets
• Improved Measurement of the Reactor Antineutrino Flux and Spectrum at Daya Bay
• Short-Baseline Active-Sterile Neutrino Oscillations?
• Experimental Determination of the Antineutrino Spectrum of the Fission Products of ${}^{238}$U
• Measurements of Charged Current Reactions of ${\nu }_e$ on ${}^{12}C$
• Online Monitoring of the Osiris Reactor with the Nucifer Neutrino Detector
• Implications of 3+1 Short-Baseline Neutrino Oscillations
• Sterile Neutrinos: Cosmology vs Short-BaseLine Experiments
• Status of 3+1 Neutrino Mixing
• Testing 3+1 and 3+2 neutrino mass models with cosmology and short baseline experiments
• KARMEN Limits on nu_e -> nu_tau Oscillations in 2-neutrino and 3-neutrino Mixing Schemes
• The PROSPECT Physics Program
• Limits on Electron Neutrino Disappearance from the KARMEN and LSND electron neutrino - Carbon Cross Section Data
• Reactor antineutrino fluxes - status and challenges
• Short-Baseline Electron Neutrino Oscillation Length After Troitsk
• VSBL Electron Neutrino Disappearance
• Prospects for Improved Understanding of Isotopic Reactor Antineutrino Fluxes
• Improved Determination of the ${}^{235}\text{U}$ and ${}^{239}\text{Pu}$ Reactor Antineutrino Cross Sections per Fission

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• 2020 Global reassessment of the neutrino oscillation picture
• Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos
• Planck 2018 results. VI. Cosmological parameters
• Neutrino Mass Ordering from Oscillations and Beyond: 2018 Status and Future Prospects
• Neutrino physics with the PTOLEMY project: active neutrino properties and the light sterile case
• Status of Light Sterile Neutrino Searches
• Constraints on Sterile Neutrinos in the MeV to GeV Mass Range
• Improved Sterile Neutrino Constraints from the STEREO Experiment with 179 Days of Reactor-On Data
• Thermalisation of sterile neutrinos in the early Universe in the 3+1 scheme with full mixing matrix
• Bounds on light sterile neutrino mass and mixing from cosmology and laboratory searches
• Fuel-composition dependent reactor antineutrino yield at RENO
• The gallium anomaly revisited
• Improved Constraints on Sterile Neutrino Mixing from Disappearance Searches in the MINOS, MINOS+, Daya Bay, and Bugey-3 Experiments
• Improved Constraints on Sterile Neutrinos in the MeV to GeV Mass Range
• Big Bang Nucleosynthesis constraints on sterile neutrino and lepton asymmetry of the Universe
• Statistical significance of the sterile-neutrino hypothesis in the context of reactor and gallium data
• Sterile neutrino self-interactions: $H_0$ tension and short-baseline anomalies
• Sterile Neutrinos and the Global Reactor Antineutrino Dataset
• The STEREO Experiment
• Constraining the invisible neutrino decay with KM3NeT-ORCA
• SoLid: A short baseline reactor neutrino experiment
• Diagnosing the Reactor Antineutrino Anomaly with Global Antineutrino Flux Data
• Cosmological Dependence of Non-resonantly Produced Sterile Neutrinos
• Reevaluating Reactor Antineutrino Anomalies with Updated Flux Predictions
• MiniBooNE, MINOS+ and IceCube data imply a baroque neutrino sector
• Gallium Anomaly: Critical View from the Global Picture of ${\nu }_e$ and ${\bar{\nu }}_e$ Disappearance
• Visible Sterile Neutrinos as the Earliest Relic Probes of Cosmology
• Quasi-Dirac neutrino oscillations at DUNE and JUNO
• Statistical Significance of Reactor Antineutrino Active-Sterile Oscillations
• KATRIN bound on 3+1 active-sterile neutrino mixing and the reactor antineutrino anomaly
• Statistical interpretation of sterile neutrino oscillation searches at reactors
• Constraining Sterile Neutrino Cosmology with Terrestrial Oscillation Experiments
• Particle physics origin of the 5 MeV bump in the reactor antineutrino spectrum?
• Cosmological Dependence of Resonantly Produced Sterile Neutrinos
• Active-sterile neutrino oscillations at INO-ICAL over a wide mass-squared range
• Neutrinoless double beta decay rates in the presence of light sterile neutrinos
• On the systematic uncertainties in DUNE and their role in New Physics studies
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• Active-sterile neutrino mixing constraint using reactor antineutrinos with the ISMRAN set-up
• Revisiting constraints on 3+1 active-sterile neutrino mixing using IceCube data
• $B-L$ model with $A_4\times Z_3\times Z_4$ symmetry for $3+1$ active$-$sterile neutrino mixing
• Status of Anomalies and Sterile Neutrino Searches at Nuclear Reactors
• New mixing schemes for (3+1) neutrinos
• Constraints on a sub-eV scale sterile neutrino from non-oscillation measurements
• Sterile neutrinos influence on oscillation characteristics of active neutrinos at short distances in the generalized model of neutrino mixing
• Sterile Neutrinos: Propagation in Matter and Sensitivity to Sterile Mass Ordering
• Lepton masses and mixings, and muon anomalous magnetic moment in an extended $B-L$ model with type I seesaw mechanism
• Non$-$zero ${\theta }_{13}$ and ${\delta }_{CP}$ phase with $A_4$ Flavor Symmetry and Deviations to Tri$-$Bi$-$Maximal mixing via $Z_2\times Z_2$ invariant perturbations in the Neutrino sector
• Neutrino oscillations: ILL experiment revisited
• Probing sterile neutrino dark matter in the PTOLEMY-like experiment
• Short-baseline neutrino oscillations with 3+1 non-unitary mixing
• Sterile neutrino searches with reactor antineutrinos using coherent neutrino-nucleus scattering experiments
• Note on Thermalization of Non-resonantly Produced Sterile Neutrinos
• Active neutrino oscillations and double beta decay characteristics with sterile neutrinos contributions
• New physics from oscillations at the DUNE near detector, and the role of systematic uncertainties
• Light sterile neutrinos: the current picture from neutrino oscillations
• Electron-antineutrino spectrum from precision measurements of ${}^{144}$Pr-decay
• Neutrino Masses from the Point of View of Economy and Simplicity
• Mass matrix parametrization for pseudo-Dirac neutrinos