{"paper":{"title":"PIONEER: Studies of Rare Pion Decays","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ph","physics.ins-det"],"primary_cat":"hep-ex","authors_text":"A. Crivellin, A. DiCanto, A. Gaponenko, A. Garcia, A. Seiden, A. Sher, A. Soter, A. Tricoli, B. Kiburg, B. Schumm, B. Velghe, C. Glaser, C. Malbrunot, C. Polly, C. Zhang, D. Bryman, D. G\\\"oldi, D. Hertzog, D. Po\\v{c}ani\\'c, D. Ries, E. Blucher, E. Worcester, H. Binney, J. LaBounty, J. Mott, J. Ott, K. Labe, K. Pachal, L. Caminada, L. Doria, L. Gibbons, M. Escobar Godoy, M. Hoferichter, M. Tarka, M. Worcester, PIONEER Collaboration: W. Altmannshofer, P. Kammel, P. Schwendimann, R. Mischke, R. Roehnelt, R. Shrock, S. Chen, S. Corrodi, S. Cuen-Rochin, S. Gori, S. Ito, S. Mihara, S.M. Mazza, T. Gorringe, T. Iwamoto, T. Mori, T. Numao, T. Sullivan, U. Langenegger, V. Cirigliano, V. Tischenko, V. Wong, W. Ootani, X. Qian, Z. Hodge","submitted_at":"2022-03-03T19:51:33Z","abstract_excerpt":"A next-generation rare pion decay experiment, PIONEER, is strongly motivated by several inconsistencies between Standard Model (SM) predictions and data pointing towards the potential violation of lepton flavor universality. It will probe non-SM explanations of these anomalies through sensitivity to quantum effects of new particles even if their masses are at very high scales. Measurement of the charged-pion branching ratio to electrons vs. muons $R_{e/\\mu}$ is extremely sensitive to new physics effects. At present, the SM prediction for $R_{e/\\mu}$ is known to 1 part in $10^4$, which is 15 ti"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2203.01981","kind":"arxiv","version":2},"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/2203.01981/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"}