{
  "abstract": "As the lightest strange scalar resonance, $K_0^*(700)$ (also called $κ$) has a large width and resides close to the $Kπ$ threshold, leading to a longstanding debate about its internal structure. Within the framework of the conventional quark-antiquark ($q\\bar{q}$) picture, this paper attempts to research the behaviors of $K_0^*(700)$ resonance in the four-body final state decays. Firstly, we investigates the $K_0^*(700)$ resonance one twist-2 and two twist-3 light-cone distribution amplitudes (LCDAs), {\\it i.e.} $ϕ_{2;K_0^*(700)}(x, μ)$ and $ϕ_{3;K_0^*(700)}^{p;σ}(x, μ)$ by constructing light-cone harmonic oscillator model. For the longitudinal distribution characteristics of the twist-2 LCDA, two typical parametrization schemes, {\\it i.e.} $φ_{2;K_0^*(700)}^{\\rm (S1)}(x)$ and $φ_{2;K_0^*(700)}^{\\rm (S2)}(x)$, are adopted in this paper. Meanwhile, it has enriched theoretical predictions for the first ten-order LCDAs $ξ$-moments. Subsequently, we apply the QCD light-cone sum rules approach to compute the $\\bar B_s^0 \\to K_0^*(700)$ transition form factors (TFFs) $f_\\pm^{\\bar B_s^0 K_0^*(700)}(q^2)$ and $f_{\\rm T}^{\\bar B_s^0 K_0^*(700)}(q^2)$ by taking into account the perturbative $\\mathcal{O}(α_s)$ corrections to the twist-2 LCDAs terms. By using the simplified series expansion parameterization, these TFFs are extrapolated over the full physical region. Then, we calculate the differential decay widths and branching fractions for four-body semileptonic decay $\\bar{B}_s^0 \\to K^0π^+ \\ell^-\\barν_\\ell$ with $\\ell= (e, μ, τ)$ via the $S$-wave $K_0^*(700)$ resonance, respectively. We expect that the obtained prediction results will provide valuable insights for future experiments and theoretical research.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: EPJC 86 (2026) 1246",
  "arxiv": "2606.24223",
  "author_total": 5,
  "authors": [
    {
      "name": "Dong Huang"
    },
    {
      "name": "Sheng-Bo Wu"
    },
    {
      "name": "Fang-Ping Peng"
    },
    {
      "name": "Long Zeng"
    },
    {
      "name": "Hai-Bing Fu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/22xcd5memjqmc.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.24223",
  "fulltext_url": null,
  "id": "22xcd5memjqmc",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.24223",
  "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/2606.24223",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/22xcd5memjqmc.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:58Z",
      "native_id": "2606.24223",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.24223"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Addressing the lightest $S$-wave strange $K_0^*(700)/κ$ resonance in four-body semileptonic $\\bar{B}_s^0 \\to K^0π^+ \\ell^-\\barν_\\ell$ decays",
  "title_text": "Addressing the lightest S-wave strange K_0^*(700)/κ resonance in four-body semileptonic B̅_s^0 → K^0π^+ ℓ^-ν̅_ℓ decays",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:56Z",
  "url": "https://research.draconitic.com/paper/22xcd5memjqmc",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1140/epjc/s10052-026-16484-4",
      "pid": "d3dbh7d7jvpgc",
      "relation": "published-as",
      "title": "Addressing the lightest S-wave strange $$K_0^*(700)/\\kappa $$ resonance in four-body semileptonic $$\\bar{B}_s^0 \\rightarrow K^0\\pi ^+ \\ell ^-\\bar{\\nu }_\\ell $$ decays",
      "venue": "The European Physical Journal C"
    }
  ]
}