{
  "abstract": "We investigate the effects of a massive invisible fermion in $Λ_b^0 \\to Λ_c^+ \\ell^- \\bar{X}_{\\rm inv}$ decays using a model-independent weak effective theory. Through a comprehensive angular analysis, we show that a nonzero invisible-particle mass leaves characteristic imprints on angular observables that can distinguish massless and massive invisible states. We further demonstrate that these observables provide strong discrimination among vector/axial-vector, scalar/pseudoscalar, and tensor interactions, as well as between left- and right-handed quark and lepton current operators.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.11840",
  "author_total": 2,
  "authors": [
    {
      "name": "Shantanu Sahoo"
    },
    {
      "name": "Soumitra Nandi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/80egbz19p2nn6.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.11840",
  "fulltext_url": null,
  "id": "80egbz19p2nn6",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.11840",
  "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": "W7212255136",
  "pdf_url": "https://arxiv.org/pdf/2609.11840",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/80egbz19p2nn6.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:26Z",
      "native_id": "2609.11840",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.11840"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Signatures of Invisible Fermions in $Λ_b^0 \\to Λ_c^+ \\ell^- \\bar{X}_{\\rm inv}$ Decays",
  "title_text": "Signatures of Invisible Fermions in Λ_b^0 → Λ_c^+ ℓ^- X̅_inv Decays",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:26Z",
  "url": "https://research.draconitic.com/paper/80egbz19p2nn6",
  "venue": "arXiv",
  "versions": []
}