{
  "abstract": "We study particle production in high-energy states for theories given by an RG flow between an asymptotically free or conformal theory in the UV and a massive theory in the IR. Using the framework of detector matching, we argue that distributions of produced particles satisfy universal evolution equations with energy, determined by the spectrum of light-ray operators of the UV theory. In particular, we interpret the UV Chew-Frautschi plot as a wave equation for particle densities on the mass shell, evolving with energy. (When the UV theory is a CFT, this wave equation is the same one that controls the spread of chaos in hyperbolic space at a particular temperature.) We test these ideas for integrable flows in 2d CFTs, finding an independent derivation of the evolution equations in terms of the thermodynamics of a Feynman gas. We also discuss consequences for 4d gauge theories, including the presence of a BFKL contrail produced by an outgoing wave of hadron number density.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.03787",
  "author_total": 3,
  "authors": [
    {
      "name": "Alexandre Homrich"
    },
    {
      "name": "David Simmons-Duffin"
    },
    {
      "name": "George Yuzhe Zhou"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1z1yvmqs5wswx.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.03787",
  "fulltext_url": null,
  "id": "1z1yvmqs5wswx",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.03787",
  "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",
      "hep-th"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.03787",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1z1yvmqs5wswx.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T15:21:25Z",
      "native_id": "2611.03787",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.03787"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Chaos on the mass shell",
  "title_text": "Chaos on the mass shell",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/1z1yvmqs5wswx",
  "venue": "arXiv",
  "versions": []
}