{"paper":{"title":"The remaining parts for the long-standing J/psi polarization puzzle","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Bin Gong, Chao-Hsi Chang, Jian-Xiong Wang, Yu Feng","submitted_at":"2018-10-21T17:08:34Z","abstract_excerpt":"Based on the non-relativistic quantum chromodynamics factorization formalism, the polarization parameters $\\lambda_{\\theta\\phi}$ and $\\lambda_{\\phi}$ of $J/\\psi$ hadroproduction are analyzed in helicity frame and calculated at QCD next-to-leading order for the first time. For prompt $J/\\psi$ production, we take into account the feeddown contributions from $\\chi_{cJ}$ and $\\psi(2S)$ decays. The theoretical predictions for the polarization parameters $\\lambda_{\\theta\\phi}$ and $\\lambda_{\\phi}$ of $J/\\psi$ are presented. With the theoretical results we have done the fit to the experimental measur"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1810.08989","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"}