Sterile Neutrino Fits to Short-Baseline Neutrino Oscillation Measurements

By J. Conrad, C. Ignarra, G. Karagiorgi, M. Shaevitz, J. Spitz. 2012

178 citations recorded by the source corpus.

This paper reviews short-baseline oscillation experiments as interpreted within the context of one, two, and three sterile neutrino models associated with additional neutrino mass states in the ~1 eV range. Appearance and disappearance signals and limits are considered. We show that fitting short-baseline datasets to a 3 + 3 (3 + 2) model, defined by three active and three (two) sterile neutrinos, results in an overall goodness of fit of 67% (69%) and good compatibility between data sets—to be compared to a 3 + 1 model with a 55% goodness of fit. While the (3 + 3) fit yields the highest quality overall, it still finds inconsistencies with the MiniBooNE appearance datasets; in particular, the global fit fails to account for the observed MiniBooNE low-energy excess. Given the overall improvement, we recommend using the results of (3 + 2) and (3 + 3) fits, rather than (3 + 1) fits, for future neutrino oscillation phenomenology. These results motivate the pursuit of further short-baseline experiments, such as those reviewed in this paper.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/b83233a1e04e7e724c7a04d68eb36c4a55026ab7

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In Nuclear and High Energy Physics

1. M. Drewes
2. M. Shaposhnikov
3. R. Essig
4. A. Ringwald
5. K. Zurek
6. Alexey Boyarsky
7. Oleg Ruchayskiy
8. J. Redondo

Citations in the corpus

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• Sterile neutrino oscillations: the global picture (2013, background): “There are some differences between our disappearance region and figure 6 (right) of [34], mainly at”
• Global Analyses of Neutrino Oscillation Experiments (2015, unknown): “[58] of those data under the hypothesis of additional neutrino species at the eV scale (see [59,60] for similar analyses).”