{"paper":{"title":"New constraint on the existence of the mu+-> e+ gamma decay","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["physics.ins-det"],"primary_cat":"hep-ex","authors_text":"A. De Bari, A. Graziosi, A. Korenchenko, A. Maki, A. M. Baldini, A. Papa, A. Popov, A. Yamamoto, B. Golden, B. I. Khazin, C. Bemporad, C. Cerri, C. Topchyan, C. Voena, D. Kaneko, D. Mzavia, D. N. Grigoriev, D. Nicolo, D. Zanello, E. Baracchini, E. Ripiccini, F. Cei, F. Gatti, F. Ignatov, F. Renga, F. Sergiampietri, F. Tenchini, F. Xiao, G. Boca, G. Cavoto, G. Gallucci, G. Lim, G. Piredda, G. Signorelli, H. Natori, H. Nishiguchi, J. Egger, K. Fratini, L. Galli, M. De Gerone, MEG collaboration: J. Adam, M. Grassi, M. Hildebrandt, M. Panareo, M. Rossella, N. Khomotov, N. Kravchuk, O. Kiselev, P.-R. Kettle, P. W. Cattaneo, R. Nardo, R. Pazzi, R. Sawada, R. Valle, S. Dussoni, S. Mihara, S. Ritt, S. Suzuki, S. Yamada, S. Yamashita, T. Doke, T. Haruyama, T. Iwamoto, T. Mori, W. Molzon, W. Ootani, X. Bai, Y. Fujii, Y. Hisamatsu, Y. Nishimura, Y. Uchiyama, Yu. V. Yudin, Z. You","submitted_at":"2013-03-04T16:56:26Z","abstract_excerpt":"The analysis of a combined data set, totaling 3.6 \\times 10^14 stopped muons on target, in the search for the lepton flavour violating decay mu^+ -> e^+ gamma is presented. The data collected by the MEG experiment at the Paul Scherrer Institut show no excess of events compared to background expectations and yield a new upper limit on the branching ratio of this decay of 5.7 \\times 10^-13 (90% confidence level). This represents a four times more stringent limit than the previous world best limit set by MEG."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1303.0754","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":""},"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"}