{
  "abstract": "High-energy astrophysical neutrinos probe non-standard neutrino interactions over cosmological distances. We study flavor-dependent interactions between neutrinos and dark matter (DM) for neutrinos produced inside the dense DM spike surrounding the supermassive black hole of the blazar TXS~0506+056. A flavor-diagonal potential $V_α=A_α\\,ρ_χ(r)$ induced by coherent forward scattering modifies the mixing in the medium, and the flavor-dependent scattering cross section attenuates the neutrino flux along the line of sight. We show that the propagation is adiabatic throughout the spike and the halo, so that the matter eigenstates produced at the source are conserved and only re-projected onto flavors at Earth. Two regimes emerge. For $A\\ll 10^{-38}\\,{\\rm cm^3}$ the mixing is unaffected and the IceCube three-flavor composition limits the cross section to $σ_{νχ}/m_χ\\lesssim 10^{-28}\\,{\\rm cm^2/GeV}$. For larger $A$ the interacting flavor is isolated into a single matter eigenstate at the source; the two remaining eigenstates escape without attenuation, producing a survival plateau that relaxes the limits by up to four orders of magnitude. The sign of the potential can differ between neutrinos and antineutrinos, so that the isolated state connects to different vacuum mass eigenstates for $ν$ and $\\barν$, which leaves a characteristic imprint on the flavor composition even without attenuation. The requirement that the potential induced by the dark matter density around Earth do not affect the observed PMNS matrix, so that the flavor projection at Earth is performed with the local matter mixing, gives A$\\lesssim 10^{-30}\\text{cm} ^3$. The combined constraints are presented in the $(A,σ_{νχ}/m_χ)$ plane and compared with a vector-mediator benchmark.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.09037",
  "author_total": 2,
  "authors": [
    {
      "name": "Ki-Young Choi"
    },
    {
      "name": "Ankhbayar Tugssaikhan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/6pjfzfwa3gxxa.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.09037",
  "fulltext_url": null,
  "id": "6pjfzfwa3gxxa",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.09037",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "hep-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.09037",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-06",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/6pjfzfwa3gxxa.ris",
  "sources": [
    {
      "first_seen": "2026-11-10T06:21:04Z",
      "native_id": "2611.09037",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.09037"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Probing flavor-dependent neutrino-dark matter interactions with the flavor composition of high-energy cosmic neutrinos",
  "title_text": "Probing flavor-dependent neutrino-dark matter interactions with the flavor composition of high-energy cosmic neutrinos",
  "type": "preprint",
  "updated_at": "2026-11-10T06:21:04Z",
  "url": "https://research.draconitic.com/paper/6pjfzfwa3gxxa",
  "venue": "arXiv",
  "versions": []
}