{
  "abstract": "Positivity bounds rest on twice-subtracted dispersion relations, which assume that the amplitude grows more slowly than $s^2$. For the massless shift-symmetric scalar with $g_4(\\partialϕ)^4/Λ^4$ and $g_6(\\partialϕ)^6/Λ^8$, we derive the dispersion relation, whose cuts start at zero energy, and study the large-$s$ growth at fixed $t<0$ of the tree, the one-loop bubble and the three-loop banana. The partial-wave sum is split at a transition spin: low spins are bounded by unitarity, channel by channel, and high spins are evaluated with the eikonal phase of the crossed-channel logarithms by stationary phase. The same construction is applied in the forward limit required by the dispersion relation, and we use the one- and three-loop absorptive parts below the cutoff to constrain $g_4$ and $g_6$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.04505",
  "author_total": 1,
  "authors": [
    {
      "name": "Ji Li"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8q1svweszj67m.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.04505",
  "fulltext_url": null,
  "id": "8q1svweszj67m",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.04505",
  "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/2611.04505",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8q1svweszj67m.ris",
  "sources": [
    {
      "first_seen": "2026-11-04T15:21:25Z",
      "native_id": "2611.04505",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.04505"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Regge bounds and eikonal scaling in a four-dimensional scalar EFT",
  "title_text": "Regge bounds and eikonal scaling in a four-dimensional scalar EFT",
  "type": "preprint",
  "updated_at": "2026-11-06T18:21:01Z",
  "url": "https://research.draconitic.com/paper/8q1svweszj67m",
  "venue": "arXiv",
  "versions": []
}