{"paper":{"title":"Anatomy of the $\\rho$ resonance from lattice QCD at the physical point","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-lat"],"primary_cat":"hep-ph","authors_text":"Andrei Alexandru, Terrence Draper, Wei Sun, Yi-Bo Yang, Ying Chen, Zhaofeng Liu","submitted_at":"2015-07-09T14:59:30Z","abstract_excerpt":"We propose a strategy to access the $q\\bar{q}$ component of the $\\rho$ resonance in lattice QCD. Through a mixed action formalism (overlap valence on domain wall sea), the energy of the $q\\bar{q}$ component is derived at different valence quark masses, and shows a linear dependence on $m_\\pi^2$. The slope is determined to be $c_1=0.505(3)\\,{\\rm GeV}^{-1}$, from which the valence $\\pi \\rho$ sigma term is extracted to be $\\sigma_{\\pi \\rho}^{(\\rm val)}=9.82(6)$ MeV using the Feynman-Hellman theorem. At the physical pion mass, the mass of the $q\\bar{q}$ component is interpolated to be $m_\\rho=775."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1507.02541","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":""},"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"}