{"paper":{"title":"Multi-Pion Systems in Lattice QCD and the Three-Pion Interaction","license":"","headline":"","cross_cats":["hep-ph","nucl-th"],"primary_cat":"hep-lat","authors_text":"Aaron Torok, Kostas Orginos, Martin J. Savage, Silas R. Beane, Thomas C. Luu, William Detmold","submitted_at":"2007-10-09T17:30:43Z","abstract_excerpt":"The ground-state energies of 2, 3, 4 and 5 \\pi^+'s in a spatial volume V (2.5 fm)^3 are computed with lattice QCD. By eliminating the leading contribution from three-\\pi^+ interactions, particular combinations of these n-\\pi^+ ground-state energies provide precise extractions of the \\pi^+\\pi^+ scattering length in agreement with that obtained from calculations involving only two \\pi^+'s. The three-\\pi^+ interaction can be isolated by forming other combinations of the n-\\pi^+ ground-state energies. We find a result that is consistent with a repulsive three-\\pi^+ interaction for m_\\pi < 352 MeV."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0710.1827","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"}