1996/09/01 by Μ. Beneke, Beneke, M.
Economics, Econometrics and Finance · Mathematics · #FOS: Physical sciences #Geometric Analysis and Curvature Flows #High Energy Physics - Phenomenology (hep-ph) #Stochastic processes and financial applications #advanced mathematical theories
paper · pdf · doi:10.48550/arxiv.hep-ph/9609214
openalex publication_date 1996/09/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We discuss the calculation of the width difference ΔΓBs between the Bs mass eigenstates to next-to-leading order in the heavy quark expansion. 1/mb-corrections are estimated to reduce the leading order result by typically 30%. The error of the present estimate (ΔΓ/Γ)Bs = 0.16+0.11-0.09 could be substantially improved by pinning down the value of ⟨ Bs |( bisi)S-P( bjsj)S-P| Bs⟩ and an accuracy of 10% in (ΔΓ/Γ)Bs should eventually be reached. We briefly mention strategies to measure (ΔΓ/Γ)Bs, and its implications for constraints on ΔMBs, CKM parameters and the observation of CP violation in untagged Bs samples.