{
  "abstract": "Dark sector containing heavy (charged) particles with small mass splitting with dark matter (DM) can co-annihilate and produce correct relic density, evading direct detection bounds. In such compressed spectra, the charged state can be long-lived and decay to DM along with a very soft charged particle, giving rise to distinctive disappearing or kink track signatures at colliders. As an example, we consider the Inert Doublet Model (IDM), where the charged scalar $H^\\pm$ can be nearly degenerate with the neutral DM state ($H^0$), and produce a soft pion ($π^\\pm$) when it decays. We investigate this signature at a future $e^+e^-$ collider, focusing on electroweak $H^+H^-$ pair production and its displaced decays. By varying the mass splitting, we explore the transition from prompt soft-particle signatures to long-lived and disappearing-track signatures. Our analysis demonstrates the potential of future lepton colliders to probe the interplay between the charged-particle lifetime, its decay probability within the tracking volume, and the production rate sensitivity to the compressed DM scenarios over a broad range of masses, allowed by cosmological constraints.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.20444",
  "author_total": 4,
  "authors": [
    {
      "name": "Hrishikesh Deka"
    },
    {
      "name": "Subhaditya Bhattacharya"
    },
    {
      "name": "Amir Subba"
    },
    {
      "name": "Ritesh K. Singh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7r5cpa8hq2s1j.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.20444",
  "fulltext_url": null,
  "id": "7r5cpa8hq2s1j",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.20444",
  "language": null,
  "licence": "CC0-1.0",
  "licence_label": "CC0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/publicdomain/zero/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "hep-ph"
    ],
    [
      "openalex",
      "3106|Particle physics theoretical and experimental studies"
    ]
  ],
  "openalex": "W7221968426",
  "pdf_url": "https://arxiv.org/pdf/2610.20444",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7r5cpa8hq2s1j.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2610.20444",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.20444"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Displaced tracks as a signal of dark matter co-annihilation: a case study using inert doublet model at $e^+e^-$ collider",
  "title_text": "Displaced tracks as a signal of dark matter co-annihilation: a case study using inert doublet model at e^+e^- collider",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:31Z",
  "url": "https://research.draconitic.com/paper/7r5cpa8hq2s1j",
  "venue": "arXiv",
  "versions": []
}