Sterile Neutrino Shape-shifting Caused by Dark Matter

Abstract

Light sterile neutrinos with a mass of $\sim 1$ eV continue to be interesting due to multiple hints from terrestrial experiments. This simple hypothesis suffers from strong astrophysical constraints, in particular from the early universe as well as solar neutrinos. We develop a cosmologically viable proposal consistent with the terrestrial hints, as well as solar constraints, by sourcing the sterile neutrino's mass from ordinary matter via an ultralight scalar $\varphi$ which can also be the dark matter. In this scenario, the experimentally implied $\sim 1$ eV sterile neutrino mass is a local value and changes throughout spacetime.

11 pages, 1 figure, 2 tables; v3: clarifying remarks, references, and further discussion added, matches published version

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Cited by in corpus (11)

• Self-interactions of ULDM to the rescue?
• Solar Neutrinos and the Strongest Oscillation Constraints on Scalar NSI
• Probing self-interacting sterile neutrino dark matter with the diffuse supernova neutrino background
• Impact of scalar NSI on the neutrino mass ordering sensitivity at DUNE, HK and KNO
• Dark Matter Raining on DUNE and Other Large Volume Detectors
• Do neutrinos bend? Consequences of an ultralight gauge field as dark matter
• Determining the Density of the Sun with Neutrinos
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• Light Sterile Neutrinos in the Early Universe: Effects of Altered Dispersion Relations and a coupling to Axion-Like Dark Matter