{
  "abstract": "Bottom-charm tetraquarks probe the interplay of heavy-quark dynamics, light-quark correlations, color structure and nearby hadronic thresholds. We investigate the spectroscopy and strong-rearrangement properties of the $bc\\bar q\\bar q$ and $bq\\bar c\\bar q$ ($q=u,d$) systems in a Cornell-type diquark--antidiquark framework with nonrelativistic (NR) and semirelativistic (SR) kinetics. Scalar and axial-vector cluster configurations are treated explicitly, and model-parameter uncertainties are propagated into state-dependent mass errors. For the $\\bar{3}_c\\otimes 3_c$ axial-axial ground states, the $0^+$ masses are $7530.1\\pm75.4$ MeV (NR) and $7720.7\\pm78.8$ MeV (SR) for $bc\\bar q\\bar q$, and $7307.6\\pm90.5$ MeV (NR) and $7523.5\\pm93.6$ MeV (SR) for $bq\\bar c\\bar q$. The multiplets follow $0^+<1^+<2^+$, and radial spacings decrease with excitation. In the $bq\\bar c\\bar q$ sector several low-lying configurations approach the $B^*D^*$ threshold: the axial-axial $0^+$ state lies $25.7$ MeV below it in NR but $190.2$ MeV above it in SR, so its threshold assignment is model sensitive and not evidence of robust strong-interaction stability. Spin and color wavefunctions are recoupled independently, giving configuration-dependent $PP$, $PV$, $VP$ and $VV$ rearrangement strengths and distinct color-singlet projections for the $\\bar{3}_c\\otimes 3_c$ and $6_c\\otimes\\bar{6}_c$ sectors. The strong short-distance attraction of the sextet coefficient $k_s=-10/3$ makes the finite SR expansion unreliable in that branch, so quantitative masses are restricted to the antitriplet sector. The results provide experimentally useful signatures and a baseline for coupled-channel and color-mixing studies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.31144",
  "author_total": 2,
  "authors": [
    {
      "name": "Chetan Lodha"
    },
    {
      "name": "Ajay Kumar Rai"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/3w0s28y5szmv1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.31144",
  "fulltext_url": null,
  "id": "3w0s28y5szmv1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.31144",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
    ]
  ],
  "openalex": "W7223316804",
  "pdf_url": "https://arxiv.org/pdf/2610.31144",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/3w0s28y5szmv1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2610.31144",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.31144"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Spectroscopy, Regge trajectories and decay properties of the \\(bc\\bar q\\bar q\\) and \\(bq\\bar c\\bar q\\) tetraquark systems",
  "title_text": "Spectroscopy, Regge trajectories and decay properties of the bcq̅q̅ and bqc̅q̅ tetraquark systems",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/3w0s28y5szmv1",
  "venue": "arXiv",
  "versions": []
}