{"paper":{"title":"Quasi-two-body decays $B_c^+ \\to \\chi_{c0,c1} [\\rho(K^*) \\to] \\pi\\pi(K\\pi)$ in the PQCD approach","license":"http://creativecommons.org/licenses/by/4.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Jun Deng, Xian-Qiao Yu","submitted_at":"2026-07-25T11:37:29Z","abstract_excerpt":"We study the quasi-two-body decays $B_c^+ \\to \\chi_{c0,c1} [\\rho(K^*) \\to] \\pi^+\\pi^0(K^0\\pi^+)$ in the perturbative QCD framework at leading order. The $\\pi\\pi$ and $K\\pi$ pairs are produced via the P-wave resonances $\\rho(770)$, $\\rho(1450)$, $\\rho(1700)$, and $K^*(892)$, parametrized by the Gounaris-Sakurai and relativistic Breit-Wigner models.\n  The dominant $\\rho(770)$ channels yield $\\mathcal{B}(B_c^+ \\to \\chi_{c0} \\pi^+\\pi^0) = 3.24 \\times 10^{-3}$ and $\\mathcal{B}(B_c^+ \\to \\chi_{c1} \\pi^+\\pi^0) = 4.19 \\times 10^{-3}$, with constructive $\\rho$ interference contributing $\\sim 25\\%$ of t"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"2607.23163","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":""},"integrity":{"clean":true,"summary":{"advisory":0,"critical":0,"by_detector":{},"informational":0},"endpoint":"/pith/2607.23163/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"}