{"paper":{"title":"Inclusive Charmonium Production via Double $c \\bar c$ in $e^+e^-$ Annihilation","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Kuang-Ta Chao, Kui-Yong Liu, Zhi-Guo He","submitted_at":"2003-01-24T15:51:29Z","abstract_excerpt":"Motivated by the recent observation of double charm quark pair production by the Belle Collaboration, we calculate the complete ${\\cal O}(\\alpha_{s}^{2})$ inclusive production cross sections for $\\eta_{c}$, $J/\\psi$, and $\\chi_{cJ}$(J=0, 1, 2) plus $c\\bar{c}$ in $e^+ e^-$ annihilation through a virtual photon. We consider both color-singlet and color-octet contributions, and give the analytical expressions for these cross sections. The complete color-singlet calculations are compared with the approximate fragmentation calculations as functions of the center-of-mass energy $\\sqrt{s}$. We find t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0301218","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"}