{"paper":{"title":"Search for the K_S -> e+e- decay with the KLOE detector","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. Antonelli, A. Denig, A. De Santis, A. Di Domenico, A. Passeri, A. Sciubba, A. Sibidanov, B. Di Micco, B. Sciascia, C. Bini, C. Bloise, C. Di Donato, C. Gatti, D. Capriotti, D. Leone, E. De Lucia, E. Graziani, E. Pasqualucci, F. Archilli, F. Bossi, F. Ceradini, F. Crucianelli, F. Murtas, F. Nguyen, F. Perfetto, G. Bencivenni, G. Capon, G. De Zorzi, G. Felici, G. Lanfranchi, G. Venanzoni, J. Lee-Franzini, L. Tortora, M. Antonelli, M. Dreucci, M. L. Ferrer, M. Martini, M. Moulson, M. Napolitano, M. Palutan, M. Testa, P. Beltrame, P. Branchini, P. Campana, P. Ciambrone, P. De Simone, P. Franzini, P. Gauzzi, P. Massarotti, P. Santangelo, P. Valente, R.Versaci, S. Bertolucci, S. Bocchetta, S. Fiore, S. Giovannella, S. Meola, S. Miscetti, S. Mueller, T. Capussela, The KLOE Collaboration: F. Ambrosino, T. Spadaro, V. Kulikov, V. Patera, W. Kluge","submitted_at":"2008-11-06T17:51:32Z","abstract_excerpt":"We present the result of a direct search for the decay K_S -> e+e-, obtained with a sample of e+e- -> phi -> K_S K_L events produced at DAFNE, the Frascati phi-factory, for an integrated luminosity of 1.9 fb^-1. The search has been performed using a pure K_S beam tagged by the simultaneous detection of a K_L interaction in the calorimeter. Background rejection has been optimized by using both kinematic and particle identification cuts. We find BR(K_S -> e+e-) < 9x10^-9 at 90% CL, which improves by an order of magnitude on the previous best limit."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0811.1007","kind":"arxiv","version":3},"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"}