Neutrino interactions with ultralight axion-like dark matter

Abstract

In this work, we study the propagation of high energy neutrinos produced in extragalactic sources including the effect of a possible interaction with ultralight axion-like particles (UALP) with a mass $m_a\sim 10^{-22}\mathrm{eV}$ as the constituents of dark matter (DM) under the assumption that their coupling to neutrinos is dominant. We compute the cross section and describe the propagation of a diffuse neutrino flux using transport equations for each mass eigenstate. This allows us to obtain the neutrino fluxes of the different flavors to be observed at the Earth with neutrino telescopes under different assumptions for the flavor composition emitted at the sources and for a normal ordering (NO) or an inverted ordering (IO) of the neutrino masses. If the coupling of neutrinos with UALPs is the same for all flavors ($g_{\nu a}$), we find that interactions change the flavor composition of neutrinos arriving on Earth for $g_{\nu a}\gtrsim 0.5{\mathrm{GeV}}^{-1}$, causing the electron(muon) flavor to dominate in the NO(IO) case for neutrino energies above $\sim 10^5\mathrm{GeV}$. Although current data on the flavor ratios suggest that interactions with UALP DM do not take place within the range of coupling studied (particularly in the NO case) more data is needed to improve the precision of the experimentally measured flavor composition.

16 pages, 11 figures, accepted for publication in European Physical Journal C

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Cited by in corpus (7)

• Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal
• Detecting neutrino-boosted axion dark matter in the MeV gap
• Limits on ALP-neutrino couplings from loop-level processes
• Detecting High-Energy Neutrinos from Galactic Supernovae with ATLAS
• Bounds on neutrino-DM interactions from TXS 0506+056 neutrino outburst
• Characterising Dark Matter-induced neutrino potentials
• Light Sterile Neutrinos in the Early Universe: Effects of Altered Dispersion Relations and a coupling to Axion-Like Dark Matter