{"paper":{"title":"Search for the process $\\mathbf{e^+e^- \\to\\eta}$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. A. Botov, A. A. Korol, A. E. Obrazovsky, A. G. Bogdanchikov, A. G. Kharlamov, A. I. Senchenko, A. S. Kasaev, A. S. Kupich, A. V. Berdyugin, A. V. Vasiljev, A. Yu. Barnyakov, D. A. Shtol, D. B. Shwartz, D. E. Berkaev, D. N. Shatilov, D. P. Kovrizhin, E. V. Pakhtusova, I. A. Koop, I. K. Surin, K. A. Martin, K. I. Beloborodov, K. V. Pugachev, L. A. Korneev, L. V. Kardapoltsev, M. N. Achasov, N. A. Melnikova, N. Yu. Muchnoi, R. A. Litvinov, S. I. Serednyakov, S. V. Koshuba, T. V. Dimova, V. B. Golubev, V. N. Zhabin, V. P. Druzhinin, V. V. Zhulanov (SND Collaboration), Yu. A. Rogovsky, Yu. M. Shatunov, Yu. V. Usov, Z. K. Silagadze","submitted_at":"2018-06-20T08:38:04Z","abstract_excerpt":"A search for the rare decay $\\eta \\rightarrow e^+e^-$ is performed using the inverse process $e^+e^- \\rightarrow \\eta$ in the decay mode $\\eta\\to\\pi^0\\pi^0\\pi^0 $. We analyze data with an integrated luminosity of 654 nb$^{-1} $ accumulated at the VEPP-2000 $e^+e^-$ collider with the SND detector at the center-of-mass energy $E=m_\\eta c ^2\\approx 548 $ MeV, and set the upper limit $ {\\cal B} (\\eta \\rightarrow e^+ e^-) < 7 \\times 10^{-7} $ at the 90\\% confidence level."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1806.07609","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":""},"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"}