{"id":"W2167992924","doi":"10.1140/epja/i2015-15142-8","title":"Photoproduction of $ \\pi^{0}$ -pairs off protons and off neutrons","year":2015,"lang":"en","type":"article","venue":"The European Physical Journal A","topic":"Quantum Chromodynamics and Particle Interactions","field":"Physics and Astronomy","cited_by":23,"is_retracted":false,"has_abstract":true,"ca_institutions":"University of Regina; Mount Allison University","funders":"Nuclear Physics; Science and Technology Facilities Council; Natural Sciences and Engineering Research Council of Canada; Office of Science; Mount Allison University; Deutsche Forschungsgemeinschaft; George Washington University; U.S. Department of Energy; Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung; National Science Foundation","keywords":"Physics; Nuclear physics; Crystal Ball; Nucleon; Neutron; Invariant mass; Bremsstrahlung; Pion; Proton; Atomic physics; Photon; Electron","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":"codex-gemma-dda1882f352a","candidate_categories":[],"consensus_categories":[],"category_scores_codex":[0.000361257,0.00009875168,0.0001305074,0.00002557042,0.0001407324,0.00005906167,0.0001444566,0.000005260017,0.00001518993],"category_scores_gemma":[0.0000104122,0.00006363115,0.00009284699,0.0000984763,0.0001152754,0.0001439648,0.00006401769,0.000295814,0.00004462393],"about_ca_system_candidate":false,"about_ca_system_consensus":false,"about_ca_system_score_codex":0.00001224379,"about_ca_system_score_gemma":0.00003347158,"about_ca_topic_candidate":false,"about_ca_topic_consensus":false,"about_ca_topic_score_codex":0.00002508392,"about_ca_topic_score_gemma":8.361623e-7,"domain_scores_codex":[0.9991581,0.0002504081,0.0001879498,0.000111511,0.0001409745,0.0001510706],"domain_scores_gemma":[0.9993902,0.00004252892,0.0001528508,0.0001764986,0.0001050956,0.0001328208],"domain_codex":null,"domain_gemma":null,"domain_candidate":null,"domain_consensus":null,"study_design_codex":"design_other","study_design_gemma":"theoretical_or_conceptual","study_design_scores_codex":[0.0004602658,0.004464337,0.00801844,0.00004039114,0.0009956073,0.0000500813,0.02038678,0.005698918,0.2625089,0.08597674,0.0253778,0.5860218],"study_design_scores_gemma":[0.009989278,0.003981888,0.07665229,0.0006448137,0.001203018,0.001227356,0.0154959,0.1270222,0.0618066,0.528564,0.171099,0.002313708],"study_design_candidate":"theoretical_or_conceptual","study_design_consensus":null,"genre_codex":"empirical","genre_gemma":"empirical","genre_scores_codex":[0.9636596,0.00003300872,0.0002104746,0.0006961034,0.0001500295,0.000145488,0.00001026591,0.00001141876,0.03508355],"genre_scores_gemma":[0.99822,0.000004282606,0.0000368946,0.0000136289,0.001491304,0.000004214103,0.000001949572,0.00001817246,0.0002095042],"genre_candidate":"empirical","genre_consensus":"empirical","teacher_disagreement_score":0.583708,"threshold_uncertainty_score":0.2594803,"prediction_status":"machine_predicted_unvalidated"},"machine_scores":{"provisional":true,"baseline":true,"maturity_gate_passed":false,"score_opus":0.0196929053787488,"score_gpt":0.2660910686660454,"score_spread":0.2463981632872966,"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."}}