{"paper":{"title":"$Z_c(3900)$ as a Four-Quark State","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Leonard S. Kisslinger, Steven Casper","submitted_at":"2014-06-26T18:18:38Z","abstract_excerpt":"Using the method of QCD Sum Rules, we derive the correlator $\\Pi^Z$ for a state consisting of two charm quarks and two light quarks, $c\\bar{c}u\\bar{d}$, and carry out a Borel transform to find $\\Pi^Z(M_B)$. From this we find the solution that $M_B\\simeq 3.9 \\pm .2$ GeV, showing that the $Zc(3900)$ is a tetra-quark state."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1406.6967","kind":"arxiv","version":3},"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"}