{"paper":{"title":"QCD corrections to e^+ e^- to J/\\psi(\\psi(2S))+\\chi_{cJ} (J=0,1,2) at B Factories","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Kai Wang, Kuang-Ta Chao, Yan-Qing Ma","submitted_at":"2011-07-13T19:56:16Z","abstract_excerpt":"We analytically calculate the cross sections of double charmonium production in $e^+ e^- \\to J/\\psi(\\psi(2S))\\chi_{cJ}$ (J=0,1,2) at next-to-leading order (NLO) in $\\alpha_s$ in nonrelativistic QCD, and confirm factorization of these processes. In contrast to $\\chi_{c0}$ production, for which the NLO correction is large and positive, the NLO corrections for $\\chi_{c1,2}$ production can be negative, resulting in decreased $K$ factors of 0.91 and 0.78 for J=1 and 2 respectively when $\\mu = 2 m_{c}$. Consequently, the NLO QCD corrections markedly enlarge the difference between cross sections of $"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1107.2646","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"}