{"paper":{"title":"Measurement of the Proton Structure Function F_2 and \\sigma_{tot}^{\\gamma^* p} at Low Q^2 and Very Low x at HERA","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ex","authors_text":"ZEUS Collaboration","submitted_at":"1997-07-11T15:36:14Z","abstract_excerpt":"A small electromagnetic sampling calorimeter, installed in the ZEUS experiment in 1995, significantly enhanced the acceptance for very low x and low Q^2 inelastic neutral current scattering, e^{+}p \\to e^{+}X, at HERA. A measurement of the proton structure function F_2 and the total virtual photon-proton (\\gamma^*p) cross-section is presented for 0.11 \\le Q^{2} \\le 0.65 GeV^2 and 2 \\times 10^{-6} \\le x \\le 6 \\times 10^{-5}, corresponding to a range in the \\gamma^{*}p c.m. energy of 100 \\le W \\le 230 GeV. Comparisons with various models are also presented."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ex/9707025","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"}