{"paper":{"title":"Studies on X(4260) and X(4660) particles","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"De-Liang Yao, Han-Qing Zheng, Meng Shi","submitted_at":"2013-01-17T08:30:57Z","abstract_excerpt":"Studies on the X(4260) and X(4660) resonant states in an effective lagrangian approach are reviewed. Using a Breit--Wigner propagator to describe their propagation, we find that the X(4260) has a sizable coupling to the $\\omega\\chi_{c0}$ channel, while other couplings are found to be negligible. Besides, it couples much stronger to $\\sigma$ than to $f_0(980)$: $|g_{X\\Psi \\sigma}^2/g^2_{X\\Psi f_0(980)}|\\sim O(10) \\ .$ As an approximate result for X(4660), we obtain that the ratio of $\\frac{Br(X\\rightarrow\\Lambda_c^+\\Lambda_c^-)}{Br(X\\rightarrow\\Psi(2s)\\pi^+\\pi^-)}\\simeq 20$. Finally, taking X(3"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1301.4004","kind":"arxiv","version":1},"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"}