{
  "abstract": "A bstract A surprisingly large transverse polarization of Λ hyperons in unpolarized hadron-nucleon/nucleus collisions has been observed for 50 years, and the origin of this polarization remains an important open question. Recently, theoretical frameworks have advanced in describing this puzzle with the polarizing fragmentation function (PFF). We report the first measurement of Λ and $$\\overline{\\Lambda }$$ transverse polarization inside jets in unpolarized proton-proton collisions, which is directly attributed to the PFF. The polarization is measured as a function of the jet transverse momentum, the fraction of the jet momentum carried by $$\\Lambda (\\overline{\\Lambda })$$ hyperons, and the transverse momentum of $$\\Lambda (\\overline{\\Lambda })$$ hyperons relative to the jet axis. Covering a wide jet-energy range, these data provide the first constraints on the gluon PFF and allow tests of TMD evolution and its universality.",
  "abstract_shown": true,
  "affiliations": [
    "Texas A&M University",
    "Czech Technical University in Prague, FNSPE",
    "Joint Institute for Nuclear Research",
    "Panjab University",
    "Variable Energy Cyclotron Centre",
    "NRC “Kurchatov Institute”",
    "National Research Nuclear University MEPhI",
    "Kent State University",
    "Fudan University",
    "Abilene Christian University",
    "Instituto de Alta Investigación, Universidad de Tarapacá",
    "Shandong University",
    "Indian Institute of Science Education and Research (IISER)",
    "University of California",
    "Indian Institute of Science Education and Research (IISER) Tirupati",
    "University of Jammu",
    "State University of New York",
    "The Ohio State University",
    "University of Houston",
    "Chinese Academy of Sciences",
    "Yale University",
    "Lawrence Berkeley National Laboratory",
    "Purdue University",
    "Indiana University",
    "National Institute of Technology Durgapur",
    "Central China Normal University",
    "Guangxi Normal University",
    "Tsinghua University",
    "Brookhaven National Laboratory",
    "University of Heidelberg"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 100,
  "authors": [
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        0
      ],
      "name": "B. E. Aboona",
      "orcid": "0000-0001-8805-7068"
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        1
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      "name": "Jaroslav Adam",
      "orcid": "0000-0003-4696-0691"
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        2
      ],
      "name": "G. Agakishiev",
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        3
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      "name": "I. Aggarwal",
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      "name": "Madan Mohan Aggarwal",
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      "name": "Z. Ahammed",
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      "name": "A. Aitbayev",
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      "name": "Igor Genadievich Alekseev",
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      "name": "E. Alpatov",
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      "name": "A. K. Alshammri",
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      "name": "Joseph E. Atchison",
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      "name": "V. Bairathi",
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      "name": "Xianwen Bao",
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      "name": "Kenneth N. Barish",
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      "name": "H. Caines",
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      "name": "M. Calderon De La Barca Sanchez",
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      "name": "Jakub Ceska",
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      "name": "Jinhui Chen",
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      "name": "Q. Chen",
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      "name": "Zhenyu Chen",
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      "name": "J. Cheng",
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      "name": "Yunshan Cheng",
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      "name": "W. Christie",
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      "name": "X. Chu",
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      "name": "S. Corey",
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      "name": "Aman Dimri",
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      "name": "Prabhupada Dixit",
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  "bibtex": "https://research.draconitic.com/paper/7ntxrzsa95rpr.bib",
  "cited_by": 7,
  "doi": "10.1007/jhep06(2026)050",
  "fulltext_url": null,
  "id": "7ntxrzsa95rpr",
  "issns": [
    "1029-8479",
    "1126-6708",
    "1127-2236"
  ],
  "landing_url": "https://doi.org/10.1007/jhep06(2026)050",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
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      "openalex",
      "3106|Quantum Chromodynamics and Particle Interactions"
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  "pdf_url": "https://link.springer.com/content/pdf/10.1007/JHEP06(2026)050.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-06-04",
  "publisher": "Springer Nature",
  "ris": "https://research.draconitic.com/paper/7ntxrzsa95rpr.ris",
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      "first_seen": "2026-11-04T13:21:02Z",
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      "url": "https://doi.org/10.1007/jhep06(2026)050"
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  "subjects": [
    {
      "field": "physics",
      "origin": "openalex:3106|Quantum Chromodynamics and Particle Interactions",
      "subfield": "high-energy"
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  ],
  "title": "Measurement of transverse polarization of Λ and $$\\overline{\\Lambda }$$ hyperons inside jets in unpolarized proton-proton collisions at $$\\sqrt{s}=200$$ GeV",
  "title_text": "Measurement of transverse polarization of Λ and Λ ̅ hyperons inside jets in unpolarized proton-proton collisions at √s=200 GeV",
  "type": "peer-reviewed",
  "updated_at": "2026-11-04T13:21:02Z",
  "url": "https://research.draconitic.com/paper/7ntxrzsa95rpr",
  "venue": "Journal of High Energy Physics",
  "versions": []
}