Statistical Significance of the Gallium Anomaly

Abstract

We calculate the statistical significance of the anomalous deficit of electron neutrinos measured in the radioactive source experiments of the GALLEX and SAGE solar neutrino detectors taking into account the uncertainty of the detection cross section. We found that the statistical significance of the anomaly is about 3.0 sigma. A fit of the data in terms of neutrino oscillations favors at about 2.7 sigma short-baseline electron neutrino disappearance with respect to the null hypothesis of no oscillations.

6 pages; improved analysis with correlation of theoretical uncertainty

References in corpus (13)

• The Reactor Antineutrino Anomaly
• Massive neutrinos and cosmology
• Phenomenology with Massive Neutrinos
• Measurement of the solar neutrino capture rate with gallium metal. III: Results for the 2002--2007 data-taking period
• Primordial Nucleosynthesis: from precision cosmology to fundamental physics
• Cosmology seeking friendship with sterile neutrinos
• Limits on nu_e and anti-nu_e disappearance from Gallium and reactor experiments
• Short-Baseline Active-Sterile Neutrino Oscillations?
• Short-Baseline Electron Neutrino Disappearance, Tritium Beta Decay and Neutrinoless Double-Beta Decay
• Reconciling results of LSND, MiniBooNE and other experiments with soft decoherence
• Neutrino masses and cosmic radiation density: Combined analysis
• nu_e Disappearance in MiniBooNE
• Hint of CPT Violation in Short-Baseline Electron Neutrino Disappearance

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