{"paper":{"title":"Doubly hidden-charm/bottom $QQ\\bar Q\\bar Q$ tetraquark states","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Hua-Xing Chen, Shi-Lin Zhu, T. G. Steele, Wei Chen, Xiang Liu","submitted_at":"2018-03-07T04:56:52Z","abstract_excerpt":"We study the mass spectra for the $cc\\bar c\\bar c$ and $bb\\bar b\\bar b$ tetraquark states by developing a moment sum rule method. Our results show that the $bb\\bar b\\bar b$ tetraquarks lie below the threshold of $\\eta_b(1S)\\eta_b(1S)$. They are probably stable and very narrow. The masses for the doubly hidden-charm states $cc\\bar c\\bar c$ are higher than the spontaneous dissociation thresholds of two charmonium mesons. We suggest to search for such states in the $J/\\psi J/\\psi$ and $\\eta_c(1S)\\eta_c(1S)$ channels."},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1803.02522","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"}