{"id":"W2127696033","doi":"10.1038/ncomms4955","title":"An experimental limit on the charge of antihydrogen","year":2014,"lang":"en","type":"article","venue":"Nature Communications","topic":"Atomic and Molecular Physics","field":"Physics and Astronomy","cited_by":57,"is_retracted":false,"has_abstract":true,"ca_institutions":"Canadian Institute for Advanced Research; York University; University of British Columbia; University of Calgary; Simon Fraser University; TRIUMF","funders":"Lawrence Berkeley National Laboratory; Laboratory Directed Research and Development; Natural Sciences and Engineering Research Council of Canada; Israel Science Foundation; Conselho Nacional de Desenvolvimento Científico e Tecnológico; National Science Foundation; TRIUMF; Royal Society; Leverhulme Trust; Financiadora de Estudos e Projetos; Engineering and Physical Sciences Research Council; Alberta Innovates - Technology Futures; CERN; Science and Technology Facilities Council; Fonds Québécois de la Recherche sur la Nature et les Technologies; U.S. Department of Energy","keywords":"Antihydrogen; Physics; CPT symmetry; Coulomb; Nuclear physics; Charge (physics); Electric field; Electric charge; Atomic physics; Quantum electrodynamics; Particle physics; Quantum mechanics; Antimatter; Electron; Lepton","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":[0.001609254,0.0003086645,0.0002686214,0.0004743586,0.000575679,0.001057798,0.0009783217,0.001214655,0.006990566],"category_scores_gemma":[0.007452096,0.0003836654,0.0002370429,0.0002891308,0.002015358,0.002681662,0.001521408,0.001286954,0.0008190376],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.0003449373,"about_ca_system_score_gemma":0.0002611321,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00025704,"about_ca_topic_score_gemma":0.0001664124,"domain_scores_codex":[0.9989926,0.0001964908,0.00003150657,0.0002408223,0.0004535681,0.00008484712],"domain_scores_gemma":[0.9942803,0.003919962,0.000421941,0.0008471013,0.0004040919,0.000126572],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"theoretical_or_conceptual","study_design_gemma":"bench_or_experimental","study_design_scores_codex":[0.001347514,0.0002839072,0.04184067,0.0006038832,0.0001469915,0.0004965492,0.000885663,0.006720515,0.3744,0.5005684,0.003251931,0.06945392],"study_design_scores_gemma":[0.0002177655,0.001455937,0.05604542,0.0003958665,0.0001676648,0.002090182,0.0008086864,0.03773029,0.5594947,0.2957276,0.04565517,0.0002107454],"study_design_candidate":"bench_or_experimental","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.8393383,0.006242463,0.08127903,0.003424968,0.000519243,0.00003933523,0.0006952308,0.0004771822,0.06798424],"genre_scores_gemma":[0.9927294,0.0005834649,0.004592796,0.0005063232,0.000091716,0.00002926598,0.0001652862,0.0000426895,0.00125909],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.006990566,"threshold_uncertainty_score":0.0233857,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.01451216374105039,"score_gpt":0.2956071589134609,"score_spread":0.2810949951724105,"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."}}