Light scalar dark matter at neutrino oscillation experiments

Abstract

Couplings between light scalar dark matter (DM) and neutrinos induce a perturbation to the neutrino mass matrix. If the DM oscillation period is smaller than ten minutes (or equivalently, the DM particle is heavier than $0.69\times 10^{-17}$ eV), the fast-averaging over an oscillation cycle leads to a modification of the measured oscillation parameters. We present a specific $\mu -\tau$ symmetric model in which the measured value of ${\theta }_{13}$ is entirely generated by the DM interaction, and which reproduces the other measured oscillation parameters. For a scalar DM particle lighter than $10^{-15}$ eV, adiabatic solar neutrino propagation is maintained. A suppression of the sensitivity to CP violation at long-baseline neutrino experiments is predicted in this model. We find that DUNE cannot exclude the DM scenario at more than $3\sigma$ C.L. for bimaximal, tribimaximal and hexagonal mixing, while JUNO can rule it out at more than $6\sigma$ C.L. by precisely measuring both ${\theta }_{12}$ and ${\theta }_{13}$.

21 pages, 2 figures. Version to appear in JHEP

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• Viable secret neutrino interactions with ultralight dark matter
• Constraining Feeble Neutrino Interactions with Ultralight Dark Matter
• Neutrino meets ultralight dark matter: $0\mathbf{\nu \beta \beta }$ decay and cosmology
• Solar neutrino physics
• Probing the Local Dark Matter Halo with Neutrino Oscillations
• Distortion of neutrino oscillations by dark photon dark matter
• European Spallation Source as a searching tool for an ultralight scalar field
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• Characterising Dark Matter-induced neutrino potentials
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• Exploring Ultralight Scalar Assistance in Sterile Neutrino Dark Matter: Cold Spectrum and Unusual X/Gamma-ray Signatures
• Neutrino oscillation in dark matter with $L_{\mu }-L_{\tau }$
• Light Sterile Neutrinos in the Early Universe: Effects of Altered Dispersion Relations and a coupling to Axion-Like Dark Matter