{"paper":{"title":"Theoretical status of $B_s$-mixing and lifetimes of heavy hadrons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":["hep-ex"],"primary_cat":"hep-ph","authors_text":"Alexander Lenz","submitted_at":"2007-05-25T16:08:56Z","abstract_excerpt":"We review the theoretical status of the lifetime ratios $\\tau_{B^+} / \\tau_{B_d}$, $\\tau_{B_s} / \\tau_{B_d}$, $\\tau_{\\Lambda_b} / \\tau_{B_d}$ and $\\tau_{B_c}$ and of the mixing quantities $\\Delta M_s$, $\\Delta \\Gamma_s$ and $\\phi_s$. $\\Delta M_s$ and $\\Delta \\Gamma_s$ suffer from large uncertainties due to the badly known decay constants, while the ratio $\\Delta \\Gamma_s / \\Delta M_s$ can be determined with almost no non-perturbative uncertainties, therefore it can be used perfectly to find possible new physics contributions in the mixing parameters. We suggest a very clear method of visualizi"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"0705.3802","kind":"arxiv","version":3},"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"}