Combined analysis of short-baseline neutrino experiments in the (3 + 1) and (3 + 2) sterile neutrino oscillation hypotheses

By M. Sorel, J. Conrad, M. Shaevitz. 2003

147 citations recorded by the source corpus.

We investigate adding two sterile neutrinos to resolve the apparent tension existing between short-baseline neutrino oscillation results and CPT-conserving, four-neutrino oscillation models. For both (3+1) and (3+2) models, the level of statistical compatibility between the combined dataset from the null short-baseline experiments Bugey, CHOOZ, CCFR84, CDHS, KARMEN, and NOMAD, on the one hand; and the LSND dataset, on the other, is computed. A combined analysis of all seven short-baseline experiments, including LSND, is also performed, to obtain the favored regions in neutrino mass and mixing parameter space for both models. Finally, four statistical tests to compare the (3+1) and the (3+2) hypotheses are discussed. All tests show that (3+2) models fit the existing short-baseline data significantly better than (3+1) models.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/c7278dcfddfcb99e650ecf9ab2d77f5a539029dc

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Citations in the corpus

Sterile Neutrino Fits to Short-Baseline Neutrino Oscillation Measurements (2012, methodology): “This leads one to suspect that the data would prefer at least two mass splittings between the mostly active and the mostly sterile states and, thus, encourages the consideration of a (3 + 2) interpretation [20].”
Double Beta Decay, Majorana Neutrinos, and Neutrino Mass (2007, background): “In particular they discuss a model, originally suggested by Sorel et al. (2004) that adds two sterile neutrinos.”
Status of light sterile neutrino searches (2019, background): “Also, shown by the light (dark) gray areas are the 99% allowed regions for the reactor anomaly [81] (global oscillation fit [24]).”
Sterile neutrino oscillations: the global picture (2013, background): “Effects of two sterile neutrinos at the eV scale have been considered first in [31, 32], oscillations with three sterile neutrinos have been investigated in [33, 34].”
Sterile neutrino oscillations after first MiniBooNE results (2007, methodology): “∗Electronic address: maltoni@delta.ft.uam.es †Electronic address: schwetz@cern.ch I. INTRODUCTION Recently first results from the MiniBooNE (MB) experiment [1, 2] at Fermilab have been released on a search for νµ → νe appearance with a baseline of 540 m and a mean neutrino energy of about 700 MeV.”