{
  "abstract": "We develop a field-redefinition-invariant description of hadronic amplitudes outside the WZW sector at $\\mathcal{O}(1/f_a)$, including general flavour-conserving and flavour-changing quark couplings. Starting from the most general CP-conserving Lagrangian for ALP interactions with the QCD sector, we identify invariant Wilson coefficient combinations and match them onto the $U(3)$ chiral theory. Using LSZ reduction, we choose fields for which ALP--meson mixing vanishes at this order; amplitudes then depend only on direct invariant couplings, while the anomalous gluonic interaction remains encoded in the $U(1)_A$ sector. For the baryon octet, we derive the general vector and axial couplings and identify, to our knowledge for the first time, an independent invariant ALP--baryon interaction from a second topological singlet structure in the $U(3)$ baryon Lagrangian. We constrain flavour-changing couplings with rare hyperon decays and show in an explicit ultraviolet model that running and matching can generate them from flavour-diagonal high-scale couplings. Finally, we estimate baryon--antibaryon widths and find that, in a gluophilic benchmark, their sum can exceed individual exclusive mesonic widths for $2~\\text{GeV} \\le m_a \\le 3~\\text{GeV}$.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.13671",
  "author_total": 2,
  "authors": [
    {
      "name": "Jorge Alda"
    },
    {
      "name": "Stefano Rigolin"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/28a19q3978r2g.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.13671",
  "fulltext_url": null,
  "id": "28a19q3978r2g",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.13671",
  "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-ph"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7221527872",
  "pdf_url": "https://arxiv.org/pdf/2610.13671",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/28a19q3978r2g.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:36Z",
      "native_id": "2610.13671",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.13671"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "ALP interactions with mesons and baryons at $\\mathcal{O}(1/f_a)$: a general field redefinition invariant approach",
  "title_text": "ALP interactions with mesons and baryons at 𝒪(1/f_a): a general field redefinition invariant approach",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:36Z",
  "url": "https://research.draconitic.com/paper/28a19q3978r2g",
  "venue": "arXiv",
  "versions": []
}