{
  "abstract": "Searches for the production of $τ$-sleptons ($\\tildeτ$), charginos ($\\tildeχ^{\\pm}_1$), and neutralinos ($\\tildeχ^0_2$) in events with at least one hadronically decaying $τ$-lepton are presented, targeting compressed mass spectra scenarios. For charginos and neutralinos, the cascade decays producing either a $τ$-slepton or a $τ$-sneutrino are considered. Two final selections are studied, requiring either one hadronically decaying $τ$-lepton and one other charged lepton, or two or more hadronically decaying $τ$-leptons. To enhance sensitivity to the compressed mass spectra, production modes with initial-state radiation (ISR) jets are considered. The searches use 140 $\\mathrm{fb}^{-1}$ and 53 $\\mathrm{fb}^{-1}$ of proton-proton collision data recorded by the ATLAS detector at the Large Hadron Collider during 2015-2018 at a centre-of-mass energy of $\\sqrt{s} = 13$ TeV and 2022-2023 at a centre-of-mass energy of $\\sqrt{s} = 13.6$ TeV, respectively. The searches provide sensitivity to the compressed mass spectra scenarios with light $τ$-sleptons. The results are generally consistent with the Standard Model, although several deviations with local significances of $2.1-2.4 σ$ are observed. These deviations weaken the observed exclusion limits. For direct $τ$-slepton production, in the ISR channel alone the limits are set for $Δm(\\tildeτ, \\tildeχ^0_1) = 30$ GeV for $τ$-slepton masses up to $115$ GeV at 95% confidence level. Given the observed data, no exclusion limits are set for direct $τ$-sleptons production when statistically combining all considered channels. For electroweakino production, limits are set for $Δm(\\tildeχ^0_2, \\tildeχ^0_1) = 30$ GeV for $\\tildeχ^0_2$ masses up to $200$ GeV. For pure chargino pair-production, limits are set for chargino masses up to $175$ GeV for the same mass splitting.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.37215",
  "author_total": 2896,
  "authors": [
    {
      "name": "Georges Aad"
    },
    {
      "name": "Erlend Aakvaag"
    },
    {
      "name": "Braden Keim Abbott"
    },
    {
      "name": "Sara Abdelhameed"
    },
    {
      "name": "Kira Abeling"
    },
    {
      "name": "Nils Julius Abicht"
    },
    {
      "name": "Haider Abidi"
    },
    {
      "name": "Mohammed Aboelela"
    },
    {
      "name": "Asmaa Aboulhorma"
    },
    {
      "name": "Halina Abramowicz"
    },
    {
      "name": "Bobby Samir Acharya"
    },
    {
      "name": "Anke Ackermann"
    },
    {
      "name": "Jona Ackerschott"
    },
    {
      "name": "Claire Adam Bourdarios"
    },
    {
      "name": "Leszek Adamczyk"
    },
    {
      "name": "Sagar Addepalli"
    },
    {
      "name": "Matt Addison"
    },
    {
      "name": "Jahred Adelman"
    },
    {
      "name": "Habeeb Adenle"
    },
    {
      "name": "Aytul Adiguzel"
    },
    {
      "name": "Tim Adye"
    },
    {
      "name": "Tony Affolder"
    },
    {
      "name": "Yoav Afik"
    },
    {
      "name": "Merve Nazlim Agaras"
    },
    {
      "name": "Anamika Aggarwal"
    },
    {
      "name": "Catalin Agheorghiesei"
    },
    {
      "name": "Ammara Ahmad"
    },
    {
      "name": "Faig Ahmadov"
    },
    {
      "name": "Sonakshi Ahuja"
    },
    {
      "name": "Xiaocong Ai"
    },
    {
      "name": "Giulio Aielli"
    },
    {
      "name": "Arya Aikot"
    },
    {
      "name": "Malak Ait Tamlihat"
    },
    {
      "name": "Torsten Akesson"
    },
    {
      "name": "Daiya Akiyama"
    },
    {
      "name": "Sina Aktas"
    },
    {
      "name": "Gian Luigi Alberghi"
    },
    {
      "name": "Justin Albert"
    },
    {
      "name": "Una Helena Alberti"
    },
    {
      "name": "Pietro Albicocco"
    },
    {
      "name": "Sara Alderweireldt"
    },
    {
      "name": "Zackary Lee Alegria"
    },
    {
      "name": "Martin Aleksa"
    },
    {
      "name": "Igor Alexandrov"
    },
    {
      "name": "Calin Alexa"
    },
    {
      "name": "Theodoros Alexopoulos"
    },
    {
      "name": "Fabrizio Alfonsi"
    },
    {
      "name": "Malte Algren"
    },
    {
      "name": "Muhammad Alhroob"
    },
    {
      "name": "Babar Ali"
    },
    {
      "name": "Hanadi Ali"
    },
    {
      "name": "Shahzad Ali"
    },
    {
      "name": "Samuel William Alibocus"
    },
    {
      "name": "Malik Aliev"
    },
    {
      "name": "Gianluca Alimonti"
    },
    {
      "name": "Corentin Allaire"
    },
    {
      "name": "Benedict Allbrooke"
    },
    {
      "name": "Derrick Allen"
    },
    {
      "name": "Jonny Allen"
    },
    {
      "name": "Camron Stephen Alley"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/atckf5aewvhmg.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.37215",
  "fulltext_url": null,
  "id": "atckf5aewvhmg",
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  "landing_url": "https://hal.science/hal-05781936v1",
  "language": "en",
  "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"
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      "0.phys"
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      "openalex",
      "3106|Particle physics theoretical and experimental studies"
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  "openalex": "W7214903224",
  "pdf_url": "https://arxiv.org/pdf/2609.37215",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/atckf5aewvhmg.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:49Z",
      "native_id": "hal-05781936",
      "source": "hal",
      "url": "https://hal.science/hal-05781936v1"
    },
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.37215",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.37215"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Search for compressed electroweak SUSY production in final states with two $τ$-leptons in $\\sqrt{s} = 13$ and $13.6$ TeV $pp$ collisions with the ATLAS detector",
  "title_text": "Search for compressed electroweak SUSY production in final states with two τ-leptons in √s = 13 and $13.6$ TeV pp collisions with the ATLAS detector",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/atckf5aewvhmg",
  "venue": "HAL",
  "versions": []
}