Sterile Neutrino Fits to Short-Baseline Neutrino Oscillation Measurements
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AHEP.2013.163897.pdf
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Author(s)
Conrad, Janet
Ignarra, Christina
Karagiorgi, Georgia Stelios
Shaevitz, M. H.
Spitz, Joshua B.
Date Issued
2013
Journal
Advances in High Energy Physics
Publisher
Hindawi Publishing Corporation
Citation
Conrad, J. M., C. M. Ignarra, G. Karagiorgi, M. H. Shaevitz, and J. Spitz. 2013 "Sterile Neutrino Fits to Short-Baseline Neutrino Oscillation Measurements."Advances in High Energy Physics 2013: 1–26.
Version
Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Physics
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DOI of Published Version
https://doi.org/10.1155/2013/163897
