{"paper":{"title":"Theoretical update of Bs-Bs-bar mixing","license":"","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Alexander Lenz, Ulrich Nierste","submitted_at":"2006-12-13T20:33:10Z","abstract_excerpt":"We update the theory predictions for the mass difference $\\dm_s$, the width difference $\\dg_s$ and the CP asymmetry in flavour-specific decays, $a_{\\rm fs}^{s}$, for the \\bbs system. In particular we present a new expression for the element $\\Gamma_{12}^s$ of the decay matrix, which enters the predictions of $\\dg_s$ and $a_{\\rm fs}^{s}$. To this end we introduce a new operator basis, which reduces the troublesome sizes of the $1/m_b$ and $\\alpha_s$ corrections and diminishes the hadronic uncertainty in $\\dg_s/\\dm_s$ considerably. Logarithms of the charm quark mass are summed to all orders. We "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"hep-ph/0612167","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"}