{
  "abstract": "We establish a unified theory-to-simulation framework for self-interacting dark matter (SIDM) that integrates three components: (i) a comprehensive, self-contained treatment of its particle-physics foundations and a broad range of model classes; (ii) a systematic, quantitative mapping from microscopic dark-sector physics to structure-formation simulation inputs through explicit expressions and numerical prescriptions; and (iii) the development, implementation, and validation of a broad suite of SIDM algorithms and a dedicated DM decay module in the moving-mesh code AREPO-2. Under (i), we detail the particle content, symmetries, interactions, production mechanisms, and constraints of a broad landscape of elementary and composite SIDM models, and present representative viable benchmark models. Under (ii), the mapping specifies cosmological initial conditions, internal-state masses and populations, reaction networks, velocity- and angle-dependent cross sections, dissipative energy loss, and decay rates and recoil kinematics. We then apply this mapping to a broad range of SIDM model classes. Under (iii), we implement and validate SIDM algorithms with constant and velocity-dependent cross sections, covering isotropic and anisotropic scattering, multi-state elastic and inelastic reactions, and dissipative processes, alongside a dedicated DM decay module in AREPO-2. We validate these implementations through beam-lattice deflection experiments, thermalization and uniform-box decay tests, isolated-halo gravothermal core-collapse simulations, and cosmological box and zoom-in simulations. These tests recover analytical predictions, establish agreement across numerical schemes, and reproduce published benchmarks. Our theory-to-simulation framework serves as a cross-disciplinary reference and a practical bridge between SIDM particle physics and simulations of nonlinear structure formation.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.16968",
  "author_total": 10,
  "authors": [
    {
      "name": "Martin Rosenlyst"
    },
    {
      "name": "Vinh Tran"
    },
    {
      "name": "Oliver Zier"
    },
    {
      "name": "Xuejian Shen"
    },
    {
      "name": "Mark Vogelsberger"
    },
    {
      "name": "Thejs Brinckmann"
    },
    {
      "name": "Mads T. Frandsen"
    },
    {
      "name": "Jesús Zavala"
    },
    {
      "name": "Frederik Holt Dihver Christensen"
    },
    {
      "name": "Mikkel Theiss Kristensen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5n5pwxq3axegf.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.16968",
  "fulltext_url": null,
  "id": "5n5pwxq3axegf",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.16968",
  "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.CO"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7221767631",
  "pdf_url": "https://arxiv.org/pdf/2610.16968",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-26",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5n5pwxq3axegf.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:35:35Z",
      "native_id": "2610.16968",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.16968"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Self-Interacting Dark Matter: From Particle Physics Theories to Structure Formation Simulations",
  "title_text": "Self-Interacting Dark Matter: From Particle Physics Theories to Structure Formation Simulations",
  "type": "preprint",
  "updated_at": "2026-10-30T12:35:35Z",
  "url": "https://research.draconitic.com/paper/5n5pwxq3axegf",
  "venue": "arXiv",
  "versions": []
}