{
  "abstract": "We investigate the gravitational form factors (GFFs) of the kaon in a proper-time-regularized three-flavor Nambu--Jona-Lasinio model. We treat the kaon as a light--strange pseudoscalar bound state and evaluate its energy--momentum-tensor matrix element using a dressed quark--graviton vertex. By retaining the interaction-induced contact contribution alongside the quark triangle diagrams, we preserve the gravitational Ward--Takahashi identity and ensure the conservation of the total energy--momentum tensor. We determine the light- and strange-quark contributions to the kaon GFFs, contrast them with the corresponding pion results, and extract the associated pressure and shear-force distributions, together with the Breit-frame and transverse light-front mass radii. Explicit flavor-symmetry breaking dictates that the strange sector carries a larger share of the kaon momentum and mechanical response. Consequently, compared to the pion, the kaon exhibits a less negative $D$-term and more compact mechanical distributions, featuring enhanced central pressure and shear. We further show that a Ward--Takahashi-identity-preserving reduction of the $C$-term projection is essential for maintaining the pion low-energy theorem in proper-time regularization.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.29848",
  "author_total": 2,
  "authors": [
    {
      "name": "Zhibo Liu"
    },
    {
      "name": "Hiroaki Abuki"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7yck4n1g97nr3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.29848",
  "fulltext_url": null,
  "id": "7yck4n1g97nr3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.29848",
  "language": null,
  "licence": "CC0-1.0",
  "licence_label": "CC0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/publicdomain/zero/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7204934886",
  "pdf_url": "https://arxiv.org/pdf/2608.29848",
  "pmcid": null,
  "pmid": null,
  "published": "2026-08-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7yck4n1g97nr3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:41Z",
      "native_id": "2608.29848",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.29848"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Kaon gravitational form factors and mechanical structure in a three-flavor NJL model",
  "title_text": "Kaon gravitational form factors and mechanical structure in a three-flavor NJL model",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:41Z",
  "url": "https://research.draconitic.com/paper/7yck4n1g97nr3",
  "venue": "arXiv",
  "versions": []
}