{
  "abstract": "We study a two-component dark matter model in which a real singlet scalar and an inert doublet scalar are simultaneously present alongside the Standard Model, each stabilized by an independent discrete symmetry. The real singlet undergoes a strong first-order transition at high temperature, establishing an intermediate phase with a non-zero singlet vacuum expectation value, which in turn generates the barrier required for the Higgs field to complete a strongly first-order electroweak transition at a lower temperature. This two-step mechanism naturally enforces the condition $v_c/T_c \\geq 1$, the sphaleron washout-avoidance criterion necessary for electroweak baryogenesis. The gravitational wave spectrum from both steps is computed; the second step produces a decihertz signal, peaking near $0.08$--$0.34~\\mathrm{Hz}$ across the viable parameter space and $0.14$--$0.22~\\mathrm{Hz}$ at the benchmark points, that reaches the sensitivity of DECIGO for the strongest transitions and of BBO more widely, while the first remains sub-threshold for all planned detectors. At the coupling values required to drive the phase transition, the singlet is generically underabundant as a thermal relic, so the inert doublet carries the dominant fraction of the observed relic density. Confronting the model with current constraints, we find that the LUX-ZEPLIN 2024 result excludes the entire electroweak-phase-transition-viable parameter space of the singlet sector across the full mass range, even after rescaling by the singlet relic fraction, establishing a complete no-go for the singlet as a viable thermal dark matter candidate in this framework.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.28014",
  "author_total": 2,
  "authors": [
    {
      "name": "Deeksha Dattaram Naik"
    },
    {
      "name": "Arnab Chaudhuri"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4kfny9b8je6xg.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.28014",
  "fulltext_url": null,
  "id": "4kfny9b8je6xg",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.28014",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7223092654",
  "pdf_url": "https://arxiv.org/pdf/2610.28014",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-20",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/4kfny9b8je6xg.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:04Z",
      "native_id": "2610.28014",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.28014"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Two-Component Dark Matter and Strongly First-Order Electroweak Phase Transition via a Two-Step Mechanism in the Inert Doublet plus Real Singlet Model",
  "title_text": "Two-Component Dark Matter and Strongly First-Order Electroweak Phase Transition via a Two-Step Mechanism in the Inert Doublet plus Real Singlet Model",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:04Z",
  "url": "https://research.draconitic.com/paper/4kfny9b8je6xg",
  "venue": "arXiv",
  "versions": []
}