{"id":"W4417268506","doi":"10.1103/25tk-nctn","title":"First Results on the Search for Lepton Number Violating Neutrinoless Double- <mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"> <mml:mi>β</mml:mi> </mml:math> Decay with the LEGEND-200 Experiment","year":2025,"lang":"en","type":"article","venue":"Physical Review Letters","topic":"Neutrino Physics Research","field":"Physics and Astronomy","cited_by":14,"is_retracted":false,"has_abstract":true,"ca_institutions":"Queen's University; Simon Fraser University","funders":"Los Alamos National Laboratory; Lawrence Berkeley National Laboratory; Oak Ridge National Laboratory; National Science Foundation; Laboratory Directed Research and Development; Max-Planck-Gesellschaft; Office of International Science and Engineering; Division of Physics; Laboratori Nazionali del Gran Sasso; Ministerstwo Edukacji i Nauki; European Research Council; Nuclear Physics; Natural Sciences and Engineering Research Council of Canada; Science and Technology Facilities Council; Horizon 2020 Framework Programme; Office of Science; Bundesministerium für Bildung und Forschung; Ministerstvo Školství, Mládeže a Tělovýchovy; European Commission; Instituto Nazionale di Fisica Nucleare; Agentúra na Podporu Výskumu a Vývoja; Deutsche Forschungsgemeinschaft; Narodowe Centrum Nauki; U.S. Department of Energy; National Energy Research Scientific Computing Center; H2020 Marie Skłodowska-Curie Actions; Strong; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung","keywords":"MAJORANA; Double beta decay; Lepton number; Semiconductor detector; Sensitivity (control systems); Neutrino; Limit (mathematics); Germanium; Detector","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":[0.003351,0.001761467,0.0008371797,0.0012472,0.0009909633,0.002139955,0.001307775,0.001326781,0.006350649],"category_scores_gemma":[0.002180321,0.0007739644,0.001371672,0.001502915,0.0008964946,0.001019439,0.001403839,0.0009298787,0.002494583],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00122622,"about_ca_system_score_gemma":0.0008235478,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.001695912,"about_ca_topic_score_gemma":0.003816257,"domain_scores_codex":[0.9987041,0.0002483836,0.00005288953,0.000432312,0.0003443973,0.0002179315],"domain_scores_gemma":[0.9961451,0.001248765,0.0004829123,0.0007140042,0.0009167938,0.0004923688],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"bench_or_experimental","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.01073241,0.001944621,0.1024725,0.001759597,0.0009581751,0.003279656,0.001018003,0.003801052,0.7275314,0.01802034,0.02146151,0.1070206],"study_design_scores_gemma":[0.001148721,0.006604992,0.1572133,0.0002338924,0.001035873,0.004110334,0.0004463002,0.01026446,0.6943011,0.005733842,0.1184042,0.0005029921],"study_design_candidate":"bench_or_experimental","study_design_consensus":"bench_or_experimental","genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8164548,0.003594758,0.05562899,0.001210042,0.0002509723,0.0005049499,0.0135316,0.00431405,0.1045098],"genre_scores_gemma":[0.8732362,0.001373325,0.0741912,0.002048497,0.0001510207,0.0002857115,0.03023631,0.001138049,0.01733968],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.006350649,"threshold_uncertainty_score":0.021245,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.02945068159751279,"score_gpt":0.312201660005859,"score_spread":0.2827509784083462,"validation_status":"score_only:v0-immature-baseline","note":"Baseline scores from an immature model (maturity gate not passed). Scores rank; they never assert a category."}}