{"paper":{"title":"Observation of the rare eta->e+e-e+e- decay with the KLOE experiment","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.Antonelli, A.Budano, A.Denig, A.DeSantis, A.DiDomenico, A.Kupsc, A.Passeri, A.Ranieri, A.Sciubba, as members of the KLOE-2 collaboration: D.Babusci, B.DiMicco, B.Hoistad, B.Sciascia, C.Bini, C.Bloise, C.DiDonato, C.Gatti, C.Taccini, D.Badoni, D.Domenici, D.Moricciani, E.Czerwinski, E.Dane, E.DeLucia, E.Graziani, E.Iarocci, F.Archilli, F.Bossi, F.Ceradini, F.Gonnella, F.Happacher, F.Loddo, F.Nguyen, G.Bencivenni, G.Capon, G.DeRobertis, G.DeZorzi, G.Fanizzi, G.Felici, G.Morello, G.Venanzoni, G.Xu, I.Balwierz, I.PradoLonghi, I.Sarra, J.Lee-Franzini, J.Zdebik, L.Tortora, M.Antonelli, M.Dreucci, M.Jacewicz, M.Martemianov, M.Martini, M.Matsyuk, M.Moulson, M.Napolitano, M.Palutan, M.Schioppa, M.Silarski, M.Wolke, O.Erriquez, P.Branchini, P.Campana, P.Ciambrone, P.DeSimone, P.Franzini, P.Gauzzi, P.Massarotti, P.Moskal, P.Santangelo, R.Messi, R.Versaci, S.A.Bulychjev, S.Bocchetta, S.Fiore, S.Giovannella, S.Meola, S.Miscetti, S.Muller, T.Capussela, The KLOE Collaboration: F.Ambrosino, T.Johansson, T.Spadaro, V.Bocci, V.Kulikov, V.Patera, W.Wislicki","submitted_at":"2011-05-30T18:50:07Z","abstract_excerpt":"We report the first observation of the rare eta->e+e-e+e- decay based on 1.7 fb^{-1} collected by the KLOE experiment at the DAFNE phi-factory. The selection of the e+e-e+e- final state is fully inclusive of radiation. We have identified 362 +- 29 events resulting in a branching ratio of (2.4 +- 0.2_stat+bckg +- 0.1_syst) x 10^{-5}."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1105.6067","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"}