Probing scalar dark matter oscillations with neutrino oscillations

Abstract

If ultra-light dark matter (ULDM) exists and couples to neutrinos, it can be discovered via time-periodic variations in the neutrino mass and mixing parameters. We analyze the current bounds on such a scenario and establish the sensitivity expected for both time-averaged and time-resolved modulations in future neutrino oscillation experiments. We place a special emphasis in our analysis on time modulations of the CP violating mixing phase. We illustrate with a toy model the case where the leading modulation effect can be CP violating while the effect on CP conserving parameters is suppressed. We show a unique imprint that a time averaged CP violating modulation of ULDM can leave in neutrino oscillations, while direct CP asymmetries vanish.

25 pages, 8 figures

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• Parametric resonance in neutrino oscillations induced by ultra-light dark matter and implications for KamLAND and JUNO
• European Spallation Source as a searching tool for an ultralight scalar field
• Time- and Space-Varying Neutrino Mass Matrix from Soft Topological Defects
• Black Holes as Fermion Factories
• Nelson-Barr ultralight dark matter
• Ultra-light Dark Matter Search with Astrophysical Neutrino Flavour
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• Neutrino Lorentz invariance violation from the CPT-even SME coefficients through a tensor interaction with cosmological scalar fields
• Cosmogenic neutrinos as probes of new physics
• Exploring Ultralight Scalar Assistance in Sterile Neutrino Dark Matter: Cold Spectrum and Unusual X/Gamma-ray Signatures