{"paper":{"title":"New limit on the \\mu+->e+\\gamma decay with the MEG II experiment","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Corvaglia, A. De Bari, A. Kolesnikov, A. Matsushita, A. M. Baldini, A. Ochi, A. Oya, A. Papa, A. Popov, A. Rozhdestvensky, A. Venturini, B. Vitali, C. Voena, D. N. Grigoriev, D. Nicolo', D. Palo, D. Pasciuto, E. G. Grandoni, F. Cei, F. Gatti, F. Grancagnolo, F. Ignatov, F. Ikeda, F. Leonetti, F. Renga, G. Boca, G. Cavoto, G. Dal Maso, G. Gallucci, G. Signorelli, H. Benmansour, H. Nishiguchi, H. Ogawa, H. Suzuki, K. Afanaciev, K. Yamamoto, L. Ferrari Barusso, L. Galli, L. Gerritzen, M. Chiappini, M. De Gerone, M. Francesconi, M. Grassi, M. Hildebrandt, M. Panareo, M. Rossella, M. Takahashi, N. Khomutov, N. Kravchuk, N. Kuchinskiy, P.-R. Kettle, P.W. Cattaneo, R. Umakoshi, R. Yokota, S. Ban, S. Karpov, S. Mihara, S. Ritt, S. Scarpellini, T. Iwamoto, Toshinori Mori, T. Yonemoto, V. Krylov, V. Malyshev, W. Li, W. Moltzon, W. Ootani, Y. Uchiyama","submitted_at":"2025-04-22T08:53:35Z","abstract_excerpt":"This letter reports the result of the search for the decay \\mu+->e+\\gamma undertaken at the Paul Scherrer Institut in Switzerland with the MEG II experiment using the data collected in the 2021- 2022 physics runs. The sensitivity of this search is 2.2x10-13, a factor of 2.4 better than that of the full MEG dataset and obtained in a data taking period of about one fourth that of MEG, thanks to the superior performances of the new detector. The result is consistent with the expected background, yielding an upper limit on the branching ratio of B(\\mu+->e+\\gamma)<1.5 x 10-13 (90 % C.L.). Additiona"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2504.15711","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/2504.15711/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"}