{
  "annotation_id": "941c734b-3dd1-4852-a866-9c249175e908",
  "date_created": "2026-02-17T05:53:08.861000Z",
  "date_modified": "2026-02-17T05:53:08.861000Z",
  "file_hash": "a2bf592cfa301f3ce01444af41caf3dab5890d5953b695def065af315b8280e7",
  "private": false,
  "record": {
    "abstract": "We present a systematic study of the leading- and next-to-leading-twist light-cone distribution amplitudes (LCDAs) of ground-state pseudoscalar and vector quarkonium within the light-front quark model (LFQM). By implementing the replacement $M \\to M_0$, we analyze the longitudinal and transverse structures of the LCDAs, together with their Gegenbauer moments, $\\xi$-moments, and transverse momentum moments. We show that charge-conjugation symmetry enforces the exact vanishing of all odd Gegenbauer moments and odd $\\xi$-moments. For pseudoscalar quarkonium, the twist-2 and twist-3 LCDAs become identical, which lead to their Gegenbauer moments, $\\xi$-moments, and transverse momentum moments are the same, respectively. For vector quarkonium, although the twist-2 and twist-3 LCDAs differ in the case of masses quark, they progressively converge as the quark mass increases. In the heavy-quark limit, all quarkonium LCDAs satisfy $\\phi^A_{2} = \\phi^P_{3} \\simeq \\phi^{\\parallel}_{2} \\simeq \\phi^{\\perp}_{3}$, demonstrating an emergent twist-independence of quarkonium distribution amplitudes. We further find that the LCDAs become increasingly peaked and narrower with increasing quark mass, reflecting the meson system becomes increasingly close to a nonrelativistic bound state, with a more uniform and stable distribution of internal longitudinal momentum. For all quarkonium, the peak value exhibits a simple phenomenological scaling behavior governed by the ratio $m/\\beta$. The transverse momentum moments increase with the meson mass, indicating a progressively more compact bound-state structure. These results reveal a universal and systematic evolution of quarkonium LCDAs driven by the quark mass.",
    "arxiv_id": "2601.06825",
    "authors": [
      "Shuai Xu",
      "Xiao-Nan Li",
      "Jin-Zhong Han",
      "Bai-hui Cheng",
      "Li-li Chen",
      "Qin Chang"
    ],
    "categories": [
      "hep-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "Quarkonium light-cone distribution amplitudes: twist structure and mass dependence",
    "url": "https://arxiv.org/abs/2601.06825",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "961bffa6-9fb5-4a00-a5fe-540f5446b49d",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}