{
  "abstract": "We investigate charged lepton-flavor violation (LFV) induced by dimension-six four-lepton operators within the Standard Model effective field theory(SMEFT) at a proposed high-energy muon collider. We study the processes $μ^{+}μ^{-}\\to e^{\\pm}τ^{\\mp}$, $μ^{+}μ^{-}\\to e^{\\pm}μ^{\\mp}$, and $μ^{+}μ^{-}\\to μ^{\\pm}τ^{\\mp}$ at $\\sqrt{s}=3$, $10$, and $14$~TeV, incorporating beam polarization and hadronic $τ$ reconstruction. Using an optimal-observable analysis of the angular distributions, we perform a global fit to the relevant set of four-lepton operators. Projected sensitivities reach $C/Λ^{2}\\sim(0.5-1.2) \\times10^{-4}\\,\\mathrm{TeV}^{-2}$, depending on the flavor and chiral structure of the operator, exceeding current limits by up to an order of magnitude. A combined analysis of multiple center-of-mass energies and beam polarizations significantly improves the resolution of correlations among the Wilson coefficients. These results highlight the strong sensitivity of a future multi-TeV muon collider to charged LFV four-lepton interactions, establishing it as a powerful probe of the SMEFT parameter space.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: S. Dutta, P. Unnikrishnan, and Yashasvi, Probing lepton-flavor-violating four-lepton operators at a muon collider, Phys.Rev. D 114, 075015 (2026)",
  "arxiv": "2607.26020",
  "author_total": 3,
  "authors": [
    {
      "name": "Sukanta Dutta"
    },
    {
      "name": "Purnath Unnikrishnan"
    },
    {
      "name": "Yashasvi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2swbm4js0gdg7.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.26020",
  "fulltext_url": null,
  "id": "2swbm4js0gdg7",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.26020",
  "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": null,
  "pdf_url": "https://arxiv.org/pdf/2607.26020",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2swbm4js0gdg7.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:36Z",
      "native_id": "2607.26020",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.26020"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Probing Lepton-Flavor-Violating Four-Lepton Operators at a Muon Collider",
  "title_text": "Probing Lepton-Flavor-Violating Four-Lepton Operators at a Muon Collider",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:36Z",
  "url": "https://research.draconitic.com/paper/2swbm4js0gdg7",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/k249-jg2x",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}