{"paper":{"title":"Towards next-to-next-to-leading-log accuracy for the width difference in the $B_s-\\bar{B}_s$ system: fermionic contributions to order $(m_c/m_b)^0$ and $(m_c/m_b)^1$","license":"http://arxiv.org/licenses/nonexclusive-distrib/1.0/","headline":"","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Arsen Yeghiazaryan, Artyom Hovhannisyan, H. M. Asatrian, Ulrich Nierste","submitted_at":"2017-09-07T09:54:19Z","abstract_excerpt":"We calculate a class of three-loop Feynman diagrams which contribute to the next-to-next-to-leading logarithmic approximation for the width difference $\\Delta\\Gamma_{s}$ in the $B_s-\\bar{B}_s$ system. The considered diagrams contain a closed fermion loop in a gluon propagator and constitute the order $\\alpha_s^2 N_f$, where $N_f$ is the number of light quarks. Our results entail a considerable correction in that order, if $\\Delta\\Gamma_{s}$ is expressed in terms of the pole mass of the bottom quark. If the $\\overline{MS}$ scheme is used instead, the correction is much smaller. As a result, we "},"claims":{"count":0,"items":[],"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"source":{"id":"1709.02160","kind":"arxiv","version":2},"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"}