{"paper":{"title":"Next-to-leading-order study of $J/\\psi$ angular distributions in $e^{+}e^{-} \\to J/\\psi+\\eta_c,\\chi_{cJ}$ at $\\sqrt{s} \\approx 10.6$ GeV","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Zhan Sun","submitted_at":"2021-07-05T14:19:31Z","abstract_excerpt":"In this paper, we present a detailed next-to-leading-order (NLO) study of $J/\\psi$ angular distributions in $e^{+}e^{-} \\to J/\\psi+\\eta_c,\\chi_{cJ}$ ($J=0,1,2$) within the nonrelativistic QCD factorization (NRQCD). The numerical NLO expressions for total and differential cross sections, i.e., $\\frac{d\\sigma}{d\\cos\\theta}=A+B\\cos^2\\theta$, are both derived. With the inclusion of the newly-calculated QCD corrections to $A$ and $B$, the $\\alpha_{\\theta}(= B/A)$ parameters in $J/\\psi+\\chi_{c0}$ and $J/\\psi+\\chi_{c1}$ are moderately enhanced, while the magnitude of ${\\alpha_\\theta}_{J/\\psi+\\chi_{c2"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2107.02047","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2107.02047/integrity.json","findings":[],"available":true,"detectors_run":[],"snapshot_sha256":"c28c3603d3b5d939e8dc4c7e95fa8dfce3d595e45f758748cecf8e644a296938"},"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"}