{"paper":{"title":"Production of four heavy quarks and $B_c$-mesons at the $Z^0$-boson pole","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A.K. Likhoded, M.V. Shevlyagin, V.V. Kiselev","submitted_at":"1994-01-28T07:15:48Z","abstract_excerpt":"The cross-section for the production of $b{\\bar b} c{\\bar c}$ quarks in $e^+e^-$ annihilation, that proves to be at a level of $\\sigma (e^+e^- \\rightarrow b{\\bar b} c{\\bar c})/\n  \\sigma (e^+e^- \\rightarrow b{\\bar b}) \\sim 10^{-2}$ for ${\\sqrt s}=M_Z$ is calculated within the frames of the QCD perturbation theory. The cross sections for the associated production of $1S$- and $2S$-wave states of $B_c$-meson in the reaction $e^+e^- \\rightarrow B_c b{\\bar c}$ were calculated in the nonrelativistic model of a heavy quarkonium. The fragmentation function of $b\\to B_c^{(*)}$ is analysed in the scalin"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9401348","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"}