{"paper":{"title":"Isoscalar $\\pi\\pi, K\\overline{K}, \\eta\\eta$ scattering and the $\\sigma, f_0, f_2$ mesons from QCD","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ph"],"primary_cat":"hep-lat","authors_text":"David J. Wilson, Jozef J. Dudek, Raul A. Briceno, Robert G. Edwards","submitted_at":"2017-08-20T21:44:55Z","abstract_excerpt":"We present the first lattice QCD study of coupled isoscalar $\\pi\\pi,K\\overline{K},\\eta\\eta$ $S$- and $D$-wave scattering extracted from discrete finite-volume spectra computed on lattices which have a value of the quark mass corresponding to $m_\\pi\\sim391$ MeV. In the $J^P=0^+$ sector we find analogues of the experimental $\\sigma$ and $f_0(980)$ states, where the $\\sigma$ appears as a stable bound-state below $\\pi\\pi$ threshold, and, similar to what is seen in experiment, the $f_0(980)$ manifests itself as a dip in the $\\pi\\pi$ cross section in the vicinity of the $K\\overline{K}$ threshold. Fo"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1708.06667","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"}