{"paper":{"title":"Measurement of the $e^+e^- \\to\\pi^+\\pi^- $ process cross section with the SND detector at the VEPP-2000 collider in the energy region $0.525<\\sqrt{s}<0.883$ GeV","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"A. A. Baykov, A. A. Botov, A. A. Korol, A. E. Obrazovsky, A. G. Bogdanchikov, A. G. Kharlamov, A. P. Lysenko, A. S. Kupich, A. V. Berdyugin, A. Yu. Barnyakov, D. A. Shtol, D. B. Shwartz, D. E. Berkaev, D. P. Kovrizhin, E. A. Perevedentsev, E. V. Pakhtusova, I. A. Koop, I. K. Surin, I. M. Zemlyansky, K. A. Martin, K. I. Beloborodov, K. V. Pugachev, L. V. Kardapoltsev, N. A. Melnikova, N. Yu. Muchnoi, P. Yu. Shatunov, S. I. Serednyakov, SND Collaboration: M. N. Achasov, T. V. Dimova, V. B. Golubev, V. N. Zhabin, V. P. Druzhinin, Y. S. Savchenko, Yu. M. Shatunov, Yu. V. Usov, Z. K. Silagadze","submitted_at":"2020-04-01T07:30:42Z","abstract_excerpt":"The cross section of the process $e^+ e^-\\to\\pi^+\\pi^-$ has been measured in the Spherical Neutral Detector (SND) experiment at the VEPP-2000 $e^+e^-$ collider VEPP-2000 in the energy region $525 <\\sqrt[]{s} <883$ MeV. The measurement is based on data with an integrated luminosity of about 4.6 pb$^{-1}$. The systematic uncertainty of the cross section determination is 0.8 % at $\\sqrt{s}>0.600$ GeV. The $\\rho$ meson parameters are obtained as $m_\\rho = 775.3\\pm 0.5\\pm 0.6$ MeV, $\\Gamma_\\rho = 145.6\\pm 0.6\\pm 0.8$ MeV, $B_{\\rho\\to e^+ e^-}\\times B_{\\rho\\to\\pi^+\\pi^-} = (4.89\\pm 0.02\\pm 0.04)\\tim"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2004.00263","kind":"arxiv","version":9},"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/2004.00263/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"}