A Combined View of Sterile-Neutrino Constraints from CMB and Neutrino Oscillation Measurements

Abstract

We perform a comparative analysis of constraints on sterile neutrinos from the Planck experiment and from current and future neutrino oscillation experiments (MINOS, IceCube, SBN). For the first time, we express the Planck constraints on $N_{\mathrm{eff}}$ and $m_{\mathrm{eff}}^{\mathrm{sterile}}$ from the Cosmic Microwave Background in the parameter space used by oscillation experiments using both mass-squared differences and mixing angles. In a model with a single sterile neutrino species and using standard assumptions, we find that the Planck data and the oscillation experiments measuring muon-neutrino disappearance have similar sensitivity.

6 pages, 3 figures, Version accepted by Physics Letters B, minor changes to text, results unchanged

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Cited by in corpus (8)

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• Thermalisation of sterile neutrinos in the early Universe in the 3+1 scheme with full mixing matrix
• Bounds on light sterile neutrino mass and mixing from cosmology and laboratory searches
• Flavor-dependent radiative corrections in coherent elastic neutrino-nucleus scattering
• A Dark Matter Interpretation of the ANITA Anomalous Events
• Direct comparison of sterile neutrino constraints from cosmological data, ${\nu }_e$ disappearance data and ${\nu }_{\mu }\to {\nu }_e$ appearance data in a $3+1$ model
• Constraints on metastable superheavy dark matter coupled to sterile neutrinos with the Pierre Auger Observatory