{
  "abstract": "We study the single production of first-generation weak-isosinglet vector-like leptons (VLLs) at future $e^+e^-$ colliders through $e^+e^-\\to e^\\pm E^\\mp$, with the subsequent decays $E^\\pm\\to W^\\pmν_e$, $e^\\pm Z$, and $e^\\pm h$. For the heavy VLL masses considered, the hadronic decays of the $W$ and $Z$ bosons are reconstructed as fat-jets, while the Higgs boson is reconstructed from two resolved $b$-tagged jets at $\\sqrt{s}=1~{\\rm TeV}$ and as a fat-jet at $\\sqrt{s}=1.5~{\\rm TeV}$. Using detector-level Monte Carlo simulations for the 1~TeV ILC and 1.5~TeV CLIC, we perform a baseline cut-based analysis in which the well-defined two-body production kinematics are exploited through a mass-hypothesis-dependent selection on the associated-electron energy. At fixed nominal center-of-mass energy, this observable is in one-to-one correspondence with the VLL recoil mass and therefore provides a common mass-sensitive discriminator for all three decay channels. We derive the $2σ$ exclusion and $5σ$ discovery reaches on the VLL--electron mixing angle $\\sinθ_L$ as functions of the integrated luminosity. For the benchmark points studied, sizeable sensitivity is retained at $m_E=900~{\\rm GeV}$ at the ILC and $m_E=1400~{\\rm GeV}$ at CLIC, while the accessible values of $\\sinθ_L$ extend below the reference electroweak precision bound used in this study. These results demonstrate the complementary potential of direct searches for first-generation singlet VLLs at future lepton colliders.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.14195",
  "author_total": 2,
  "authors": [
    {
      "name": "Yao-Bei Liu"
    },
    {
      "name": "Stefano Moretti"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8vp9n47ryech8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.14195",
  "fulltext_url": null,
  "id": "8vp9n47ryech8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.14195",
  "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",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7203614762",
  "pdf_url": "https://arxiv.org/pdf/2608.14195",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/8vp9n47ryech8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:34:34Z",
      "native_id": "2608.14195",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.14195"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Probing the Single Production of First-Generation Singlet Vector-like Leptons at Future $e^+e^-$ Colliders",
  "title_text": "Probing the Single Production of First-Generation Singlet Vector-like Leptons at Future e^+e^- Colliders",
  "type": "preprint",
  "updated_at": "2026-10-30T12:34:34Z",
  "url": "https://research.draconitic.com/paper/8vp9n47ryech8",
  "venue": "arXiv",
  "versions": []
}