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arXiv · 2603.08813

Axion-neutrino interactions in seesaw models and astrophysical probes

P. Kivokurtseva
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Abstract

We study axion-neutrino interactions in neutrino-mass extensions of the Standard Model, focusing on the Type-I and inverse seesaw. In these frameworks the effective coupling $g_{a\nu}$ is tied to the axion scale and can be constrained using existing astrophysical limits on axion couplings to electrons. We then estimate the impact of axion-mediated scattering on neutrino propagation in two benchmarks: resonant interactions with the C$\nu$B and scattering on axion dark matter. In the parameter space allowed by current bounds, the resulting optical depths are extremely small, implying no observable signatures with present sensitivities.

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P. Kivokurtseva. 2026-03-09. Axion-neutrino interactions in seesaw models and astrophysical probes. https://doi.org/10.31857/s0044451026080011

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