{"paper":{"title":"Evidence of the $e^+ e^-\\to f_1(1285)$ reaction with the CMD-3 detector at VEPP-2000","license":"http://creativecommons.org/publicdomain/zero/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A.A. Grebenuk, A.A. Korobov, A.A. Ruban, A.A. Talyshev, A.E. Bondar, A.E. Ryzhenenkov, A.I. Vorobiov, A.L. Erofeev, A.N. Amirkhanov, A.N. Kozyrev, A.O. Gorkovenko, A.S. Kasaev, A.S. Kuzmin, A.S. Popov, A.V. Anisenkov, A.V. Bragin, A.V. Semenov, B.A. Shwartz, D.A. Epifanov, D.B. Shwartz, D.E. Berkaev, D.E. Chistyakov, D.N. Grigoriev, D.N. Shemyakin, D.S. Zhadan, E.A. Eminov, E.P. Solodov, E.V. Bedarev, F.V. Ignatov, G.V. Fedotovich, I.A. Koop, I.B. Logashenko, I.V. Obraztsov, K.Yu. Mikhailov, L.B. Epshteyn, L.B. Fomin, M.V. Timoshenko, N.A. Petrov, N.S. Bashtovoy, P.A. Lukin, P.P. Krokovny, R.R. Akhmetshin, S.A. Rastigeev, S.S. Gribanov, S.S. Tolmachev, S.V. Karpov, T.A. Kuznetsov, V.E. Shebalin, V.F. Kazanin, V.G. Petrochenko, V.L. Ivanov, V.M. Aulchenko, V.M. Titov, V.S. Denisov, Yu.A. Rogovsky, Yu.V. Yudin","submitted_at":"2026-08-04T10:10:00Z","abstract_excerpt":"A search for the $e^+ e^-\\to f_1(1285)$ reaction is performed with the CMD-3 detector at the VEPP-2000 collider. Data from a scan in the center-of-mass energy range Ec.m.=1.20--1.36 GeV with 109.1 pb$^{-1}$ of the integrated luminosity is used. A dedicated 51.7 pb$^{-1}$ have been collected at the $f_1(1285)$ resonance peak energy Ec.m.=1282 MeV, where $26.5 \\pm 7.4$ events have been found in the $e^+ e^-\\to\\eta\\pi^0\\pi^0$ reaction. No indication of the signal is observed in the scan data. We interpret the result as 4.5$\\sigma$ evidence of the C-even resonance production in the $e^+ e^-\\to f_1"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2608.03417","kind":"arxiv","version":1},"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/2608.03417/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"}