{"paper":{"title":"Photonic production of P-wave states of B_c mesons","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A.K.Likhoded, A.V.Berezhnoy, V.V.Kiselev","submitted_at":"1995-10-06T11:32:12Z","abstract_excerpt":"Numerical calculations for the production of $P$-wave levels of $B_c$ quarkonium in $\\gamma\\gamma$ collisions are performed in the leading $O(\\alpha_s^2\\alpha_{em}^2)$ order of perturbation theory. The total cross-section of $P$-wave state production is about 10 \\% of that for the $S$-wave levels. The contribution of fragmentation component ($6+6$ diagrams) is low, and the basic contribution is determined by the recombination mechanism ($8$ Feynman diagrams). The gauge invariant term of the $\\bar b\\to B_c$ fragmentation ($6$ diagrams) quite accurately reproduces the result of the fragmentation"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/9510238","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"}