{"paper":{"title":"rho-Meson Nucleon Scattering Length from CLAS Threshold Photoproduction Measurements","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":["hep-ex","hep-ph","nucl-ex"],"primary_cat":"nucl-th","authors_text":"Axel Schmidt (GWU), Evgeny L. Isupov (MGU), Igor I. Strakovsky (GWU), Victor Mokeev (Jlab)","submitted_at":"2025-09-04T21:35:28Z","abstract_excerpt":"Extending our study of the vector meson-nucleon scattering lengths (summary is given in Ref.~\\cite{Strakovsky:2021vyk}), we are focusing on the $\\rho$-meson case using recent CLAS threshold data for the reaction $\\gamma p \\to \\rho p$ within the meson-baryon reaction model~\\cite{CLAS:2018drk}. The total $\\sigma_t(\\gamma p\\to \\rho p)$ and $\\sigma_t(\\gamma p\\to \\omega p)$ cross sections are close below the momentum of the vector meson in CM $q = 0.2~\\mathrm{GeV/c}$. Then the $\\rho p$ photoproduction cross section grows rapidly. Our result for $\\rho N$ scattering length is a factor of 4 smaller th"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2509.04672","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/2509.04672/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"}