{
  "abstract": "Neutrino rest mass enables left-handed states to \"flip\" to right-handed states and vice versa. In-medium effects can enhance the probability for such spin-flip. We demonstrate that a full many-body calculation of this process in neutrino-dense environments can lead to spin-flip probabilities that exceed by orders of magnitude those calculated with mean-field treatments. We study simple configurations with a few neutrinos in well-defined momentum states, for which we show that the helicity conversion enhancement is connected to many-body momentum exchange. Such an effect would therefore be missed in a calculation that considers only forward processes. We speculate on the potential astrophysical implications of these results and the range of applicability of our calculation and its limitations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. D 114, 063016 (2026)",
  "arxiv": "2605.31242",
  "author_total": 5,
  "authors": [
    {
      "name": "Yiheng Xu"
    },
    {
      "name": "Julien Froustey"
    },
    {
      "name": "George M. Fuller"
    },
    {
      "name": "Lukáš Gráf"
    },
    {
      "name": "Amol V. Patwardhan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1f1178xn383pm.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.31242",
  "fulltext_url": null,
  "id": "1f1178xn383pm",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.31242",
  "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/2605.31242",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1f1178xn383pm.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:41Z",
      "native_id": "2605.31242",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.31242"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Neutrino helicity oscillations in astrophysical environments: A many-body approach",
  "title_text": "Neutrino helicity oscillations in astrophysical environments: A many-body approach",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:41Z",
  "url": "https://research.draconitic.com/paper/1f1178xn383pm",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/2p4r-f1gs",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}