{"paper":{"title":"Search for a 33.9 MeV/c^2 Neutral Particle in Pion Decay","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Alton, A. Bodek, A. Romosan, A. Vaitaitis, B. T. Fleming, C. McNulty, D. A. Harris, D. Buchholz, D. Mason, D. Naples, E. D. Zimmerman, E. G. Stern, G .P. Zeller, H. Budd, H. M. Schellman, J. A. Formaggio, J. Brau, J. Goldman, J. H. Kim, J. M. Conrad, J. Yu, K. S. McFarland, L. Bugel, L. de Barbaro, M. Goncharov, M. H. Shaevitz, M. J. Lamm, M. Vakili, P. de Barbaro, P. Nienaber, P. Spentzouris, R. A. Johnson, R. B. Drucker, R. Frey, R. H. Bernstein, S. Avvakumov, S. Case, S. Koutsoliotas, T. Adams, T. Bolton, U. K. Yang, V. Wu, W. K. Sakumoto, W. Marsh","submitted_at":"1999-12-24T16:44:11Z","abstract_excerpt":"The E815 (NuTeV) neutrino experiment has performed a search for a 33.9 MeV/c^2 weakly-interacting neutral particle produced in pion decay. Such a particle may be responsible for an anomaly in the timing distribution of neutrino interactions in the KARMEN experiment. E815 has searched for this particle's decays in an instrumented decay region; no evidence for this particle was found. The search is sensitive to pion branching ratios as low as 10^-13."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9912062","kind":"arxiv","version":1},"verdict":{"id":null,"model_set":{},"created_at":null,"strongest_claim":"","one_line_summary":"","pipeline_version":null,"weakest_assumption":"","pith_extraction_headline":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/hep-ex/9912062/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"references":{"count":0,"sample":[],"resolved_work":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57","internal_anchors":0},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}