VSBL Electron Neutrino Disappearance

Abstract

We consider possible indications of Very-Short-BaseLine (VSBL) electron neutrino disappearance into sterile neutrinos in MiniBooNE neutrino data and Gallium radioactive source experiments. We discuss the compatibility of such a disappearance with reactor and MiniBooNE antineutrino data. We find a tension between neutrino and antineutrino data which could be due to: 1) statistical fluctuations; 2) underestimate of systematic uncertainties; 3) exclusion of our hypothesis of VSBL nu_e disappearance; 4) a violation of CPT symmetry. Considering the first possibility, we present the results of a combined fit of all data, which indicate that P_{ee} < 1 with 97.04 CL. We consider also the possibility of CPT violation, which leads to the best-fit value A_{ee}^{CPT,bf} = -0.17 for the asymmetry of the nu_e and antinu_e survival probabilities and A_{ee}^{CPT} < 0 at 99.7 CL.

19 pages

References in corpus (37)

• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Unexplained Excess of Electron-Like Events From a 1-GeV Neutrino Beam
• The Neutrino Flux prediction at MiniBooNE
• Sterile neutrino oscillations after first MiniBooNE results
• Limits on nu_e and anti-nu_e disappearance from Gallium and reactor experiments
• Testing the statistical compatibility of independent data sets
• Global three-parameter model for neutrino oscillations using Lorentz violation
• Short-Baseline Active-Sterile Neutrino Oscillations?
• Are sterile neutrinos consistent with clusters, the CMB and MOND?
• Accelerator Neutrino Beams
• Constraints on dark matter particles from theory, galaxy observations and N-body simulations
• Anomaly mediated neutrino-photon interactions at finite baryon density
• A Search for Electron Antineutrino Appearance at the $\Delta m^2\sim$ 1 ${\mathrm{eV}}^2$ Scale
• Oscillation Physics with a Neutrino Factory
• Sterile Neutrinos in Light of Recent Cosmological and Oscillation Data: a Multi-Flavor Scheme Approach
• Topical Review on "Beta-beams"
• Signature of sterile species in atmospheric neutrino data at neutrino telescopes
• Reconciling results of LSND, MiniBooNE and other experiments with soft decoherence
• Standard Model Gauging of the WZW Term: Anomalies, Global Currents and pseudo-Chern-Simons Interactions
• Short Baseline Neutrino Oscillations and a New Light Gauge Boson
• Three-flavour neutrino oscillation update and comments on possible hints for a non-zero theta_{13}
• nu_e Disappearance in MiniBooNE
• Cosmological constraints on a light non-thermal sterile neutrino
• MiniBooNE Results and Neutrino Schemes with 2 sterile Neutrinos: Possible Mass Orderings and Observables related to Neutrino Masses
• Sterile neutrinos at the CNGS
• Probing Active to Sterile Neutrino Oscillations in the LENS Detector
• Confusing Sterile Neutrinos with Deviation from Tribimaximal Mixing at Neutrino Telescopes
• LSND versus MiniBooNE: Sterile neutrinos with energy dependent masses and mixing?
• CPT/Lorentz Invariance Violation and Neutrino Oscillation
• Neutrinos as galactic dark matter in the Ursa Major galaxy group?
• Testing Primordial Abundances With Sterile Neutrinos
• The (3+2) Neutrino Mass Spectrum and Double Chooz
• Signatures of sterile neutrino mixing in high-energy cosmic neutrino flux
• Solar Neutrinos (with a tribute to John. N. Bahcall)
• Measuring the mass of a sterile neutrino with a very short baseline reactor experiment
• Muon internal bremsstrahlung: a conventional explanation for the excess electron-neutrino events in MiniBoone
• Status of the T2K 280m Near Detector

Cited by in corpus (23)

• Statistical Significance of the Gallium Anomaly
• 3+1 and 3+2 Sterile Neutrino Fits
• Light sterile neutrinos
• Implications of 3+1 Short-Baseline Neutrino Oscillations
• Status of 3+1 Neutrino Mixing
• Short-Baseline Electron Neutrino Disappearance, Tritium Beta Decay and Neutrinoless Double-Beta Decay
• Model-Independent ${\bar{\nu }}_e$ Short-Baseline Oscillations from Reactor Spectral Ratios
• Theta_13: phenomenology, present status and prospect
• Light Sterile Neutrinos: Status and Perspectives
• Effects of CP Violation from Neutral Heavy Fermions on Neutrino Oscillations, and the LSND/MiniBooNE Anomalies
• Physics with near detectors at a neutrino factory
• Matter Effects in Active-Sterile Solar Neutrino Oscillations
• Neutrino Oscillations, Lorentz/CPT Violation, and Dark Energy
• MINOS and CPT-violating neutrinos
• Hint of CPT Violation in Short-Baseline Electron Neutrino Disappearance
• Short-Baseline Electron Neutrino Disappearance at a Neutrino Factory
• KATRIN bound on 3+1 active-sterile neutrino mixing and the reactor antineutrino anomaly
• Short-Baseline antinu_mu -> antinu_e Oscillations
• Short-baseline Neutrino Oscillation Waves in Ultra-large Liquid Scintillator Detectors
• Sterile Neutrino Fits
• Short-BaseLine Electron Neutrino Disappearance
• EUROnu-WP6 2010 Report
• Phenomenology of Sterile Neutrinos