{"paper":{"title":"Non-factorizable contributions to $\\bar{B^0_d} \\to D_s^{(*)} \\bar{D_s^{(*)}}$ from chiral loops and tree level $1/N_c$ terms","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"A. Prapotnik Brdnik, J.O. Eeg, S. Fajfer","submitted_at":"2005-09-23T10:17:42Z","abstract_excerpt":"We point out that the amplitudes for the decays $\\bar{B}^0 \\to D_s^+ D_s^-$ and $\\bar{B}^0_s \\to D^+ D^-$ have no factorizable contributions. If one or two of the $D$-mesons in the final state are vectors (i.e $D^*$ 's) there are relatively small factorizable contributions through the annihilation mechanism. The dominant contributions to the decay amplitudes arise from chiral loop contributions and $1/N_c$ suppressed tree level. We predict that the branching ratios for the processes $\\bar B^0_d \\to D_s^+ D_s^-$,\n  $\\bar B^0_d \\to D_s^{+*} D_s^- $ and $\\bar B^0_d \\to D_s^+ D_s^{-*}$ are all of "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0509252","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"}