{
  "abstract": "We investigate a non-relativistic realization of the boostless cosmological collider in a scenario where inflationary interactions are mediated by a massive tilted-ghost spectator field. Unlike standard boostless collider constructions, in which the characteristic non-Gaussian signatures are mainly generated by boost-breaking interaction vertices, the dominant effect in the present framework arises directly from the propagation of the spectator modes. Non-relativistic corrections deform the bulk mode functions, inducing a tilt that modifies the in-in correlators and generates a distinctive collider signal. The resulting squeezed-limit non-Gaussianity reproduces the qualitative structure of boostless cosmological-collider signals while originating from a fundamentally different dynamical mechanism. A central feature of the construction is the emergence of an effective chemical-potential-like parameter that controls the relative weight of the two late-time oscillatory branches. However, the tilted-ghost mode exhibits distinctive dynamical features and does not correspond to a conventional chemical-potential deformation. Depending on the sign of the tilt, the corresponding non-Gaussian signal can be either enhanced or suppressed. We show that the tilted-ghost scenario provides a simple effective framework in which boostless-collider phenomenology and chemical-potential-like branch asymmetries arise naturally from non-relativistic propagation effects.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: JCAP08(2026)049",
  "arxiv": "2605.20102",
  "author_total": 2,
  "authors": [
    {
      "name": "Matheus C. Ferreira"
    },
    {
      "name": "Felipe T. Falciano"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/9trd8wvn6590g.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.20102",
  "fulltext_url": null,
  "id": "9trd8wvn6590g",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.20102",
  "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",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2605.20102",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/9trd8wvn6590g.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2605.20102",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.20102"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Non-relativistic Cosmological Collider Signals",
  "title_text": "Non-relativistic Cosmological Collider Signals",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/9trd8wvn6590g",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1088/1475-7516/2026/08/049",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}