{"paper":{"title":"Nucleon form factors in dispersively improved Chiral Effective Field Theory II: Electromagnetic form factors","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-lat","nucl-ex","nucl-th"],"primary_cat":"hep-ph","authors_text":"C. Weiss, J. M. Alarc\\'on","submitted_at":"2017-10-17T18:00:00Z","abstract_excerpt":"We study the nucleon electromagnetic form factors (EM FFs) using a recently developed method combining Chiral Effective Field Theory ($\\chi$EFT) and dispersion analysis. The spectral functions on the two-pion cut at $t > 4 M_\\pi^2$ are constructed using the elastic unitarity relation and an $N/D$ representation. $\\chi$EFT is used to calculate the real functions $J_\\pm^1 (t) = f_\\pm^1(t)/F_\\pi(t)$ (ratios of the complex $\\pi\\pi \\rightarrow N \\bar N$ partial-wave amplitudes and the timelike pion FF), which are free of $\\pi\\pi$ rescattering. Rescattering effects are included through the empirical"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1710.06430","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":""},"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"}