{"id":"W4408804774","doi":"10.1140/epjc/s10052-025-13916-5","title":"Search for light neutral particles decaying promptly into collimated pairs of electrons or muons in pp collisions at $$\\sqrt{s}$$ = 13 $$\\text {T}\\text {e}\\hspace{-1.00006pt}\\text {V}$$ with the ATLAS detector","year":2025,"lang":"en","type":"article","venue":"The European Physical Journal C","topic":"Particle physics theoretical and experimental studies","field":"Physics and Astronomy","cited_by":2,"is_retracted":false,"has_abstract":true,"ca_institutions":"Institute of Particle Physics; Simon Fraser University; York University; University of British Columbia; Carleton University; University of Toronto; University of Alberta; Université de Montréal; University of Victoria; McGill University","funders":"CHIST-ERA; H2020 Marie Skłodowska-Curie Actions; Institut National de Physique Nucléaire et de Physique des Particules; Agencia Estatal de Investigación; Agencia Nacional de Promoción Científica y Tecnológica; Fundação para a Ciência e a Tecnologia; Japan Society for the Promotion of Science; Ministero dell'Università e della Ricerca; Narodowa Agencja Wymiany Akademickiej; Forskningsrådet om Hälsa, Arbetsliv och Välfärd; Ministerstvo Školství, Mládeže a Tělovýchovy; National Science and Technology Council; European Social Fund; Royal Society; Centre National pour la Recherche Scientifique et Technique; European Regional Development Fund; British Columbia Knowledge Development Fund; Max-Planck-Gesellschaft; Centre National de la Recherche Scientifique; Knut och Alice Wallenbergs Stiftelse; U.S. Department of Energy; Carl Tryggers Stiftelse för Vetenskaplig Forskning; Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro; Israel Science Foundation; Ministerstwo Edukacji i Nauki; Conselho Nacional de Desenvolvimento Científico e Tecnológico; Bundesministerium für Wissenschaft, Forschung und Wirtschaft; Generalitat de Catalunya; Generalitat Valenciana; Agencia Nacional de Investigación y Desarrollo; UK Research and Innovation; Istituto Nazionale di Fisica Nucleare; Grantová Agentura České Republiky; Austrian Science Fund; Natural Sciences and Engineering Research Council of Canada; Ministry of Education, Culture, Sports, Science and Technology; Bundesministerium für Bildung und Forschung; Horizon 2020 Framework Programme; Vetenskapsrådet; National Natural Science Foundation of China; European Commission; Leverhulme Trust; Fundação de Amparo à Pesquisa do Estado de São Paulo; Javna Agencija za Raziskovalno Dejavnost RS; Science and Technology Facilities Council; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; Deutsche Forschungsgemeinschaft; Nederlandse Organisatie voor Wetenschappelijk Onderzoek; Ministry of Science and Technology of the People's Republic of China; Agence Nationale de la Recherche; National Science Foundation; Baden-Württemberg Stiftung; H2020 European Research Council; Norges Forskningsråd; Alexander von Humboldt-Stiftung; TRIUMF; Danmarks Grundforskningsfond; Türkiye Enerji, Nükleer ve Maden Araştırma Kurumu; Canarie; CERN; Centres de Recerca de Catalunya; Ministerio de Ciencia e Innovación","keywords":"Muon; Physics; Collimated light; Electron; Nuclear physics; Optics","routes":{"ca_aff":true,"ca_fund":true,"ca_venue":false,"about_ca":false,"invisible_to_affiliation_only":false},"retraction":null,"screen":null,"direct_labels":[],"prediction":{"model_version":"metacan-v3-hybrid-931329e0061c","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.0007648122,0.0005340256,0.0005670832,0.001144535,0.0005700013,0.001228924,0.0005118269,0.0005491213,0.003308126],"category_scores_gemma":[0.0005391773,0.0004542544,0.0003923762,0.001238075,0.0002252848,0.0004659969,0.0006656332,0.0002515955,0.000663024],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0005015033,"about_ca_system_score_gemma":0.0004913416,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.001868658,"about_ca_topic_score_gemma":0.003073322,"domain_scores_codex":[0.9996353,0.00007705415,0.00001739048,0.00008480217,0.0001032547,0.00008214443],"domain_scores_gemma":[0.9994874,0.0001662157,0.000104432,0.00005100141,0.00006981146,0.00012113],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"observational","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.007803801,0.0007853557,0.5728568,0.0003124777,0.0006492669,0.009332576,0.0004701845,0.006557751,0.3615854,0.007440337,0.003664402,0.0285416],"study_design_scores_gemma":[0.001312164,0.003795174,0.5107327,0.00004559315,0.0008494353,0.006753781,0.0009769764,0.05318911,0.408455,0.003389466,0.01027541,0.0002253196],"study_design_candidate":"bench_or_experimental","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9886813,0.0001911807,0.004276324,0.00008589614,0.000008633233,0.00005258312,0.001348131,0.0001867941,0.00516923],"genre_scores_gemma":[0.9928839,0.00005110776,0.003974511,0.00004359264,0.000006995633,0.00001959491,0.001478514,0.0000239313,0.001517848],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.003308126,"threshold_uncertainty_score":0.01106673,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0153720396065072,"score_gpt":0.2811059719449523,"score_spread":0.2657339323384452,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). 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