{
  "abstract": "$t\\bar{t}$ spin correlations originating from theoretical models assuming on one side toponium bound state formation in proton-proton collisions at 13 TeV are compared against predictions from non-relativistic QCD ressumation effects via Green's function formalism that go beyond the perturbative $t\\bar{t}$ baseline with no bound state but could justify extra yield of events in the $t\\bar{t}$ mass spectrum recently observed by ATLAS and CMS Collaborations, still awaiting an explanation. Toponium production comprises two scenarios, a simplified Effective Field Theory (EFT) with $η_t\\rightarrow t\\bar{t}$ decays and an additional model with scalar and vector toponium states with $η_t\\rightarrow HZ$ and $J_t\\rightarrow ZW^+W^-$ decays. Experimental measurements on $t\\bar{t}$ system are added to the comparisons. Fitted diagonal spin correlation $C_{kk}$, $C_{rr}$, $C_{nn}$ matrix terms show a relative increase in value ranging from 200%-2330% for toponium $t\\bar{t}$ decays with respect the perturbative NLO baseline. Relative contribution from resummation effect ranges from 0.6% to 10.4% and its combination with perturbative baseline improves agreement with Data distributions, with $χ^2/N_\\mathrm{dof}$ value reduced by $\\sim$4.5%-60.0% . Equivalent fitted cross-section for resummation effect $σ_{res}$, ranges from 7.3 to 9.1 pb in consistency with excess yield reported by LHC experiments. $σ_{res}$ $>$ 50 pb range is excluded at 95% C.L. A classifier performing at detector level achieves a ROC curve area of $0.91$ leading to toponium signal to background significances over 55. These results indicate that efficient isolation of observed $t\\bar{t}$ excess events from background is feasible and a characterisation via spin correlation measurements would reveal their consistency with either toponium production or non-relativistic effects beyond the perturbative baseline.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.36369",
  "author_total": 4,
  "authors": [
    {
      "name": "A. Cota Rodríguez"
    },
    {
      "name": "Jesús A. V. Corral"
    },
    {
      "name": "A. Paredes Sotelo"
    },
    {
      "name": "J. A. Murillo Quijada"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bxg91fxfyp56z.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.36369",
  "fulltext_url": null,
  "id": "bxg91fxfyp56z",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.36369",
  "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-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7214964220",
  "pdf_url": "https://arxiv.org/pdf/2609.36369",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bxg91fxfyp56z.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.36369",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.36369"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "$t\\bar{t}$ spin correlations from toponium production scenarios to non-relativistic resummation beyond the standard perturbative baseline",
  "title_text": "tt̅ spin correlations from toponium production scenarios to non-relativistic resummation beyond the standard perturbative baseline",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/bxg91fxfyp56z",
  "venue": "arXiv",
  "versions": []
}