Direct comparison of sterile neutrino constraints from cosmological data, νe disappearance data and νμ→νe appearance data in a 3+1 model

Autor: Adams, M., Bezrukov, F., Elvin-Poole, J., Evans, J.J., Guzowski, P., Fearraigh, B.Ó., Söldner-Rembold, S.
Přispěvatelé: IoP (FNWI)
Jazyk: angličtina
Rok vydání: 2020
Zdroj: Adams, M, Bezrukov, F, Elvin-Poole, J, Evans, J J, Guzowski, P, Fearraigh, B Ó & Söldner-Rembold, S 2020, ' Direct comparison of sterile neutrino constraints from cosmological data, ν e disappearance data and ν μ →ν e appearance data in a 3+1 model ', The European Physical Journal C, vol. 80, 758, pp. 1-9 . https://doi.org/10.1140/epjc/s10052-020-8197-y
European Physical Journal C, 80(8):758. Springer New York
ISSN: 1434-6044
DOI: 10.1140/epjc/s10052-020-8197-y
Popis: We present a quantitative, direct comparison of constraints on sterile neutrinos derived from neutrino oscillation experiments and from Planck data, interpreted assuming standard cosmological evolution. We extend a 1+1 model, which is used to compare exclusion contours at the 95% Cl derived from Planck data to those from νe-disappearance measurements, to a 3+1 model. This allows us to compare the Planck constraints with those obtained through νμ→νe appearance searches, which are sensitive to more than one active-sterile mixing angle. We find that the cosmological data fully exclude the allowed regions published by the LSND, MiniBooNE and Neutrino-4 collaborations, and those from the gallium and rector anomalies, at the 95% Cl. Compared to the exclusion region from the Daya Bay νe-disappearance search, the Planck data are more strongly excluding above |Δm241|≈0.1eV2 and msterileeff≈0.2eV, with the Daya Bay exclusion being stronger below these values. Compared to the combined Daya Bay/Bugey/MINOS exclusion region on νμ→νe appearance, the Planck data is more strongly excluding above Δm241≈5×10−2eV2, with the exclusion strengths of the Planck data and the Daya Bay/Bugey/MINOS combination becoming comparable below this value.
Databáze: OpenAIRE
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