{"paper":{"title":"A study of the $P_{11}(1440)$ and $D_{13}(1520)$ resonances from CLAS data on $ep \\rightarrow e'\\pi^{+} \\pi^{-} p'$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph","nucl-th"],"primary_cat":"nucl-ex","authors_text":"B. S. Ishkhanov, E. L. Isupov, E. N. Golovatch, G. V. Fedotov, L. Elouadrhiri, R. W. Gothe, the CLAS Collaboration, V. D. Burkert, V. I. Mokeev","submitted_at":"2012-05-17T14:58:38Z","abstract_excerpt":"The transition helicity amplitudes from the proton ground state to the $P_{11}(1440)$ and $D_{13}(1520)$ excited states ($\\gamma_{v}pN^*$ electrocouplings) were determined from the analysis of nine independent one-fold differential $\\pi^{+} \\pi^{-} p$ electroproduction cross sections off a proton target, taken with CLAS at photon virtualities 0.25\\enskip {\\rm GeV$^{2}$} $<$ $Q^{2}$ $<$ 0.60 \\enskip {\\rm GeV$^{2}$}. The phenomenological reaction model was employed for separation of the resonant and non-resonant contributions to the final state. The $P_{11}(1440)$ and $D_{13}(1520)$ electrocoupl"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1205.3948","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"}