{
  "abstract": "We investigate the hyperfine structure of $B$ and $D$ mesons within a QCD-inspired potential model based on the Cornell ansatz. The conventional contact spin--spin term is regularized with a Gaussian smearing to remove the short-distance singularity, and analytic wavefunctions are obtained using the Dalgarno--Lewis perturbative method with the Coulomb part as parent. The numerical study has been extended to include explicit 2S hyperfine predictions and results for the $B_c$ system; these additions probe the stability of the potential parameter space (effective $α_s$, confinement strength and smearing width) for unequal-mass systems and radial excitations. We also present a short sensitivity study of the fixed effective coupling $α_s$ and discuss the physical interpretation of the smearing parameter $σ$. The combined analytic and phenomenological framework provides compact, testable benchmarks for upcoming spectroscopy measurements.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: published in Eur. Phys. J. Plus (2025) 140:1069",
  "arxiv": "2609.28544",
  "author_total": 1,
  "authors": [
    {
      "name": "Krishna Kingkar Pathak"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/88tenfze8rc71.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28544",
  "fulltext_url": null,
  "id": "88tenfze8rc71",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28544",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2609.28544",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/88tenfze8rc71.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.28544",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28544"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Hyperfine Structure of $B$ and $D$ Mesons in a QCD-Inspired Potential Model",
  "title_text": "Hyperfine Structure of B and D Mesons in a QCD-Inspired Potential Model",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/88tenfze8rc71",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1140/epjp/s13360-025-07031-3",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}