Axion-Neutrino Interactions in Seesaw Models and Astrophysical Probes
Kivokurtseva P.

Received: June 2, 2026

DOI: 10.31857/S0044451026080011

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We study axion-neutrino interactions in neutrino-mass extensions of the Standard Model, focusing on the Type-I and inverse seesaw. In benchmark scenarios where the effective ALP charge of the light neutrino is comparable to the electron coefficient, the coupling g_{a u} can be related to the axion scale and constrained using existing 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 u 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. Keywords: axion , neutrino , astrophysics