Statistical significance of the gallium anomaly

By C. Giunti, M. Laveder. 2010

384 citations recorded by the source corpus.

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 {approx}3.0{sigma}. A fit of the data in terms of neutrino oscillations favors at {approx}2.7{sigma} short-baseline electron neutrino disappearance with respect to the null hypothesis of no oscillations.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/20ed76f46be34fb1660d1cf7f7e309a1d056383a

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In Nuclear and High Energy Physics

Citations in the corpus

Updated global analysis of neutrino oscillations in the presence of eV-scale sterile neutrinos (2018, result): “The excitement is fuelled in particular by a number of unexpected experimental results: an unexplained excess of electron anti-neutrinos (ν̄e) in a muon anti-neutrino (ν̄μ) beam observed at a baseline of ∼ 30 m from the source in the LSND experiment [1]; a similar excess found by the MiniBooNE colla”
Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) Conceptual Design Report Volume 1: The LBNF and DUNE Projects (2015, background): “Several recent anomalous experimental results count among their possible interpretations phenomena that do not fit in the three-flavor mixing model [71, 72, 73, 74, 75], and searches for evidence of one or more sterile neutrino states are ongoing.”
Sterile neutrino oscillations: the global picture (2013, background): “This effect can be explained by the hypothesis of νe disappearance due to oscillations with ∆m2 & 1 eV(2) [18, 19] (“Gallium anomaly”).”
Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) Conceptual Design Report Volume 2: The Physics Program for DUNE at LBNF (2015, background): “Several recent anomalous experimental results count among their possible interpretations phenomena that do not fit in the three-flavor mixing model [71, 72, 73, 74, 75], and searches for evidence of one or more sterile neutrino states are ongoing.”
Flavor structures of charged fermions and massive neutrinos (2019, background): “The significance of such an anomaly is at the 3σ level [646, 647], and it can be interpreted as a consequence of νe → νe oscillations in the (3+1) active-sterile neutrino mixing scheme with ∆m(2)41 ∼ O(1) eV(2) and sin(2) θ14 ∼ O(10−2) to O(10−1) being the dominant oscillation parameters [648].”
Global Analyses of Neutrino Oscillation Experiments (2015, result): “can be explained by the hypothesis of νe disappearance due to oscillations with m2 1 eV2 (“Gallium anomaly”) [55,56]; • state-of-the-art calculations of the neutrino flux emitted by nuclear reactors [33,34] predict a neutrino rate which is a few percent higher than observed in short-baseline (L 100 ”