{"paper":{"title":"Transition form factors: $\\gamma^\\ast + p \\to \\Delta(1232)$, $\\Delta(1600)$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-lat","hep-ph","nucl-ex"],"primary_cat":"nucl-th","authors_text":"Chen Chen, Craig D. Roberts, Hong-shi Zong, Jorge Segovia, Sebastian M. Schmidt, Ya Lu, Zhu-Fang Cui","submitted_at":"2019-04-05T18:00:49Z","abstract_excerpt":"Electroproduction form factors describing the $\\gamma^\\ast p \\to \\Delta^+(1232), \\Delta^+(1600)$ transitions are computed using a fully-dynamical diquark-quark approximation to the Poincar\\'e-covariant three-body bound-state problem in relativistic quantum field theory. In this approach, the $\\Delta(1600)$ is an analogue of the Roper resonance in the nucleon sector, appearing as the simplest radial excitation of the $\\Delta(1232)$. Precise measurements of the $\\gamma^\\ast p \\to \\Delta^+(1232)$ transition already exist on $0 \\leq Q^2 \\lesssim 8\\,$GeV$^2$ and the calculated results compare favou"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1904.03205","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/1904.03205/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"}