{"paper":{"title":"Numerical updates of lifetimes and mixing parameters of B mesons","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alexander Lenz, Ulrich Nierste","submitted_at":"2011-02-21T16:35:24Z","abstract_excerpt":"We update the Standard-Model predictions for several quantities related to $B_s - \\bar B_s$ and $B_d - \\bar B_d$ mixing. The mass and width differences in the $B_s$ system read $ \\Delta M_s^{\\rm SM} = (17.3 \\pm 2.6) ps^{-1}$ and $\\Delta \\Gamma_s^{\\rm SM}= (0.087 \\pm 0.021) ps^{-1}$, respectively. The CP asymmetries in flavour-specific decays are $a_{\\rm fs}^{s,\\rm SM} = (1.9 \\pm 0.3) \\cdot 10^{-5}$ and $a_{\\rm fs}^{d,\\rm SM} = - (4.1 \\pm 0.6) \\cdot 10^{-4}$. We further critically discuss the sensitivity of $\\Delta \\Gamma_d$ to new physics and the uncertainties in the relation between $\\Delta \\"},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1102.4274","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"}