{
  "abstract": "The lifetime of the strong magnetic field generated in relativistic heavy-ion collisions remains one of the major open questions in the study of the quark--gluon plasma. We propose heavy-quark spin precession as a probe to quantify the magnetic field and its profile in such collisions. We investigate the Larmor evolution of polarized charm and bottom quarks propagating through an expanding quark--gluon plasma in the presence of the magnetic field. We show that realistic magnetic-field strengths and lifetimes generate measurable accumulated precession phases prior to hadronization, leading to characteristic charge-dependent polarization splittings between $Λ_c^+$ and $\\barΛ_c^-$, as well as between $Λ_b^0$ and $\\barΛ_b^0$, through the mixing of transverse and longitudinal polarization components. The predicted signals exhibit distinctive transverse-momentum and quark-mass dependence, providing complementary sensitivity to the magnetic-field lifetime in the charm and bottom sectors. Our results suggest heavy-flavor polarization, especially in the charm sector, as a quantitative probe for the space--time evolution of magnetic fields in relativistic heavy-ion collisions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.22492",
  "author_total": 2,
  "authors": [
    {
      "name": "Dushmanta Sahu"
    },
    {
      "name": "Captain R. Singh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5ajxapq9e17he.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.22492",
  "fulltext_url": null,
  "id": "5ajxapq9e17he",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.22492",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|High-Energy Particle Collisions Research"
    ]
  ],
  "openalex": "W7214010348",
  "pdf_url": "https://arxiv.org/pdf/2609.22492",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-18",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5ajxapq9e17he.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2609.22492",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.22492"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Heavy-quark spin precession as a magnetic field chronometer",
  "title_text": "Heavy-quark spin precession as a magnetic field chronometer",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/5ajxapq9e17he",
  "venue": "arXiv",
  "versions": []
}