{
  "abstract": "A bstract : We establish the analytic structure of the S-matrix in the complex-frequency plane for classical wave scattering on a Schwarzschild background in four space-time dimensions. Our argument relies on the analytic continuation of the gravitational potential, with the singularity behind the horizon playing a crucial role. We find that in the lower half-plane the partial-wave amplitudes are analytic except for the quasinormal-mode poles and the branch cut associated with late-time tails. As a direct consequence of causality, the retarded Green’s function and absorption amplitude are analytic in the upper-half plane. We show, however, that Stokes phenomena can obstruct this analyticity domain from carrying over to the elastic amplitude, which instead develops a branch-cut in the upper-half plane. We also determine the effect of infrared (IR) regulators on the analytic structure, showing that polynomial boundedness requires a sharp lower bound on the IR cutoff in terms of the Schwarzschild radius.",
  "abstract_shown": true,
  "affiliations": [
    "McGill University",
    "Department of Physics and Astronomy, University of California Los Angeles"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Miguel Correia",
      "orcid": "0000-0001-6636-9570"
    },
    {
      "affs": [
        1
      ],
      "name": "Tushar Gopalka",
      "orcid": "0000-0002-9914-2329"
    },
    {
      "affs": [
        1
      ],
      "name": "Giulia Isabella",
      "orcid": "0000-0002-7833-9595"
    },
    {
      "affs": [
        1
      ],
      "name": "Anna M. Wolz",
      "orcid": "0000-0001-8749-5904"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/4jjdh3t7tqfjc.bib",
  "cited_by": 0,
  "doi": "10.1007/jhep10(2026)150",
  "fulltext_url": "https://doi.org/10.1007/JHEP10(2026)150",
  "id": "4jjdh3t7tqfjc",
  "issns": [
    "1029-8479"
  ],
  "landing_url": "https://link.springer.com/article/10.1007/JHEP10(2026)150",
  "language": "en",
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "QC770-798"
    ],
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      "openalex",
      "3106|Black Holes and Theoretical Physics"
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  "openalex": "W4416443006",
  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP10(2026)150.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": "Springer Science and Business Media LLC",
  "ris": "https://research.draconitic.com/paper/4jjdh3t7tqfjc.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:01Z",
      "native_id": "10.1007/jhep10(2026)150",
      "source": "crossref",
      "url": "https://link.springer.com/article/10.1007/JHEP10(2026)150"
    },
    {
      "first_seen": "2026-10-30T13:45:36Z",
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      "url": "https://doi.org/10.1007/jhep10(2026)150"
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  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Black Holes and Theoretical Physics",
      "subfield": "high-energy"
    }
  ],
  "title": "Analyticity of the black hole S-matrix",
  "title_text": "Analyticity of the black hole S-matrix",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T13:45:36Z",
  "url": "https://research.draconitic.com/paper/4jjdh3t7tqfjc",
  "venue": "Journal of High Energy Physics",
  "versions": []
}