Sterile neutrino dark matter catalyzed by a very light dark photon

Abstract

Sterile neutrinos (${\nu }_s$) that mix with active neutrinos (${\nu }_a$) are interesting dark matter candidates with a rich cosmological and astrophysical phenomenology. In their simplest incarnation, their production is severely constrained by a combination of structure formation observations and X-ray searches. We show that if active neutrinos couple to an oscillating condensate of a very light $L_{\mu }-L_{\tau }$ gauge field, resonant ${\nu }_a$-${\nu }_s$ oscillations can occur in the early universe, consistent with ${\nu }_s$ constituting all of the dark matter, while respecting X-ray constraints on ${\nu }_s\to {\nu }_a\gamma$ decays. Interesting deviations from standard solar and atmospheric neutrino oscillations can persist to the present.

15 pages, 8 figures. v2: some clarifications and references added, small errors corrected, main conclusions unchanged

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Cited by in corpus (14)

• Neutrino Self-Interactions: A White Paper
• Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal
• Neutrino meets ultralight dark matter: $0\mathbf{\nu \beta \beta }$ decay and cosmology
• Two sides of the same coin: sterile neutrinos and dark radiation. Status and perspectives
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• Neutrino secret self-interactions: a booster shot for the cosmic neutrino background
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• Core-collapse Supernova Constraint on the Origin of Sterile Neutrino Dark Matter via Neutrino Self-interactions
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• Accreting Schwarzschild-like compact object: Plasma-photon interaction and stability
• Opening up New Parameter Space for Sterile Neutrino Dark Matter