{"paper":{"title":"Scalar radius of the pion and zeros in the form factor","license":"","headline":"","cross_cats":["hep-lat","nucl-th"],"primary_cat":"hep-ph","authors_text":"Jose A. Oller, Luis Roca","submitted_at":"2007-03-31T17:06:06Z","abstract_excerpt":"The quadratic pion scalar radius, \\la r^2\\ra^\\pi_s, plays an important role for present precise determinations of \\pi\\pi scattering. Recently, Yndur\\'ain, using an Omn\\`es representation of the null isospin(I) non-strange pion scalar form factor, obtains \\la r^2\\ra^\\pi_s=0.75\\pm 0.07 fm^2. This value is larger than the one calculated by solving the corresponding Muskhelishvili-Omn\\`es equations, \\la r^2\\ra^\\pi_s=0.61\\pm 0.04 fm^2. A large discrepancy between both values, given the precision, then results. We reanalyze Yndur\\'ain's method and show that by imposing continuity of the resulting pi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0704.0039","kind":"arxiv","version":2},"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/0704.0039/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"}