{
  "abstract": "In lattice QCD computations of generalized parton distributions (GPDs), the large momentum expansion generally requires all hard scales, $2|x\\pmξ|P^z$ and $2|1\\pm x|P^z$, to be much larger than $Λ_{\\rm QCD}$. We show that this condition can be relaxed for $2|x\\pmξ|P^z$ at large $ξ$, making the important $x\\sim\\pmξ$ regions accessible to lattice calculations and considerably expanding the region of computability. Revisiting previous lattice results with complete one-loop matching, we obtain the expected partonic threshold behavior---GPDs continuous at $x=\\pmξ$ but with discontinuous derivatives---which has not previously been observed on the lattice. We thus obtain, for the first time, important prediction for GPDs in the distribution-amplitude-like region, which smoothly connects the quark and antiquark PDF-like behaviors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.20545",
  "author_total": 4,
  "authors": [
    {
      "name": "Yushan Su"
    },
    {
      "name": "Xiangdong Ji"
    },
    {
      "name": "Yizhuang Liu"
    },
    {
      "name": "Rui Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bgjmk491smpmv.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.20545",
  "fulltext_url": null,
  "id": "bgjmk491smpmv",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.20545",
  "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",
      "hep-lat"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "arxiv",
      "nucl-th"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7213592050",
  "pdf_url": "https://arxiv.org/pdf/2609.20545",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bgjmk491smpmv.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:19Z",
      "native_id": "2609.20545",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.20545"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-lat",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:nucl-th",
      "subfield": "nuclear"
    }
  ],
  "title": "Computability of GPDs near $x=\\pmξ$ in Lattice QCD",
  "title_text": "Computability of GPDs near x=±ξ in Lattice QCD",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:19Z",
  "url": "https://research.draconitic.com/paper/bgjmk491smpmv",
  "venue": "arXiv",
  "versions": []
}