{
  "abstract": "Using continuum Schwinger-function methods with a nonperturbatively improved, symmetry-preserving kernel, we deliver predictions for the leading-twist light-front distribution amplitudes (DAs) of the $ρ$, $K^\\ast$, $a_1(1260)$, $b_1(1235)$, and the unmixed strange partners of the $1^{++}$ and $1^{+-}$ axial-vector (AV) channels, reconstructed from Mellin moments of the associated Bethe--Salpeter wave functions. For vector mesons, polarisation barely affects longitudinal momentum sharing: the longitudinal and transverse DAs are nearly degenerate, and both narrower than the asymptotic distribution in the second-moment sense. The AV sector is different in kind. Charge conjugation compels one projection -- interchanged between the $1^{++}$ and $1^{+-}$ channels -- to vanish at $x=1/2$ and change sign; breaking $SU_F(3)$ symmetry removes this protection, whereupon the zeroth moments become nonzero and the nodes shift from the midpoint. Under a common weighted normalisation, the $1^{+-}$ zeroth moment is $1.63$ times that of the $1^{++}$ channel, and the profile distortion follows the same pattern. A coupling forbidden by charge conjugation in the symmetric limit, $f_{b_1}=0$, becomes $f_{K_1^{+-}}=0.019\\,$GeV in the strange channel: an independent measure of the same symmetry breaking, obtained from a current matrix element rather than from the DA reconstruction. What distinguishes the two sectors is thus a symmetry-enforced zero, not the size of the flavour asymmetry.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.02329",
  "author_total": 4,
  "authors": [
    {
      "name": "Zhen-Ni Xu"
    },
    {
      "name": "Zhao-Qian Yao"
    },
    {
      "name": "Peng Cheng"
    },
    {
      "name": "Khépani Raya"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/a0m3xcrbs3wag.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.02329",
  "fulltext_url": null,
  "id": "a0m3xcrbs3wag",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.02329",
  "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-ph"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7207650292",
  "pdf_url": "https://arxiv.org/pdf/2609.02329",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/a0m3xcrbs3wag.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:31Z",
      "native_id": "2609.02329",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.02329"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Distribution amplitudes of vector and axial-vector mesons in a nonperturbatively improved symmetry-preserving framework",
  "title_text": "Distribution amplitudes of vector and axial-vector mesons in a nonperturbatively improved symmetry-preserving framework",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:31Z",
  "url": "https://research.draconitic.com/paper/a0m3xcrbs3wag",
  "venue": "arXiv",
  "versions": []
}