{
  "abstract": "We study the sensitivity of future high-luminosity $e^+e^-$ colliders to the electromagnetic and weak dipole moments of the $τ$ lepton within the Standard Model Effective Field Theory. We analyse several complementary processes across the FCC-ee operating stages and show that the exceptional luminosity and clean environment of future $e^+e^-$ colliders allow for substantial improvements over current limits from LEP and the LHC. The $e^+e^- \\to τ^+τ^-$ process provides excellent sensitivity to weak dipole operators through resonant $Z$ production and $Z$-pole energy scans, while $γγ\\to τ^+τ^-$ yields the strongest constraint on the anomalous magnetic moment owing to the dominance of linear interference effects in the near-threshold region. Higher-energy stages improve the sensitivity to the $τ$ electric dipole moment. The radiative processes $e^+e^- \\to τ^+τ^-γ$ and $H\\toτ^+τ^-γ$ provide complementary, though subleading, probes of $τ$ dipole operators. Combining all channels, we estimate the statistical reach at the 95% CL to be $|Δa_τ|<2.8\\times10^{-5}$, $|d_τ|<2.5\\times10^{-18}\\,e\\,{\\rm cm}$, $|Δa_τ^Z|<1.0\\times10^{-5}$, and $|d_τ^Z|<4.4\\times10^{-19}\\,e\\,{\\rm cm}$, improving upon the current bounds by several orders of magnitude. These projections quantify the potential statistical reach of the FCC-ee program, motivating dedicated studies incorporating detector effects, systematic uncertainties, and higher-order theoretical predictions.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.12623",
  "author_total": 6,
  "authors": [
    {
      "name": "Dario Buttazzo"
    },
    {
      "name": "Gabriele Levati"
    },
    {
      "name": "Yang Ma"
    },
    {
      "name": "Fabio Maltoni"
    },
    {
      "name": "Paride Paradisi"
    },
    {
      "name": "ZeQiang Wang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5ydsgpf02nz2z.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.12623",
  "fulltext_url": null,
  "id": "5ydsgpf02nz2z",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.12623",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7221544904",
  "pdf_url": "https://arxiv.org/pdf/2610.12623",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-08",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5ydsgpf02nz2z.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:28:36Z",
      "native_id": "2610.12623",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.12623"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Probing $τ$ lepton dipole moments at FCC-ee",
  "title_text": "Probing τ lepton dipole moments at FCC-ee",
  "type": "preprint",
  "updated_at": "2026-10-30T12:28:36Z",
  "url": "https://research.draconitic.com/paper/5ydsgpf02nz2z",
  "venue": "arXiv",
  "versions": []
}