{"paper":{"title":"Reanalysis of the $Z_c(4020)$, $Z_c(4025)$, $Z(4050)$ and $Z(4250)$ as tetraquark states with QCD sum rules","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Zhi-Gang Wang","submitted_at":"2013-12-05T13:27:08Z","abstract_excerpt":"In this article, we calculate the contributions of the vacuum condensates up to dimension-10 in the operator product expansion, and study the $C\\gamma_\\mu-C\\gamma_\\nu$ type scalar, axial-vector and tensor tetraquark states in details with the QCD sum rules. In calculations, we use the formula $\\mu=\\sqrt{M^2_{X/Y/Z}-(2{\\mathbb{M}}_c)^2}$ to determine the energy scales of the QCD spectral densities. The predictions $M_{J=2} =\\left(4.02^{+0.09}_{-0.09}\\right)\\,\\rm{GeV}$, $M_{J=1} =\\left(4.02^{+0.07}_{-0.08}\\right)\\,\\rm{GeV}$ favor assigning the $Z_c(4020)$ and $Z_c(4025)$ as the $J^{PC}=1^{+-}$ o"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1312.1537","kind":"arxiv","version":4},"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"}