{"paper":{"title":"Study of B0-->J/Psi D(*) and etac D(*) in Perturbative QCD","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Gad Eilam, Massimo Ladisa, Ya-Dong Yang","submitted_at":"2001-07-05T11:47:55Z","abstract_excerpt":"Motivated by recent interest in soft $J/\\Psi$ production in B decays, we investigate ${B}^0 \\to J/\\Psi D^{(\\star)}$ and $\\eta_c D^{(\\star)}$ decays in perturbative QCD. We find that, within that framework, these decays are calculable since the heavy $c\\bar{c}$ pair in the final states is created by a hard gluon. The branching ratios are estimated to be around $10^{-7}\\sim 10^{-8}$, too small to be consistent with the data, suggesting that other mechanism(s) contribute to the observed excess of soft $J/\\Psi$ in ${B}^0 \\to J/\\Psi + X$ decays. The possibility of the production of a hybrid $s{\\bar"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0107043","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"}