{"paper":{"title":"Decoding the $X(5568)$ as a fully open-flavor $su\\bar b\\bar d$ tetraquark state","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex","hep-lat","nucl-ex"],"primary_cat":"hep-ph","authors_text":"Hua-Xing Chen, Shi-Lin Zhu, T. G. Steele, Wei Chen, Xiang Liu","submitted_at":"2016-02-29T11:42:49Z","abstract_excerpt":"We investigate the recent evidence for a charged $X(5568)$ meson as an exotic open-flavor tetraquark state $su\\bar b\\bar d$ with $J^P=0^+/1^+$ in the framework of QCD sum rules. We use the color antisymmetric $[\\mathbf{\\bar 3_c}]_{su} \\otimes [\\mathbf{3_c}]_{\\bar{b}\\bar d}$ tetraquark currents in both scalar and axial-vector channels to perform evaluations and numerical analyses. Our results imply that the $X(5568)$ can be interpreted as both the scalar $su\\bar b\\bar d$ tetraquark state and the axial-vector one, which are in good agreement with the experimental measurement. We also discuss the"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1602.08916","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"}