Lifetime Difference of B S Mesons and Its Implications A
نویسنده
چکیده
We discuss the calculation of the width difference ∆Γ Bs between the Bs mass eigen-states to next-to-leading order in the heavy quark expansion. 1/m b-corrections are estimated to reduce the leading order result by typically 30%. The error of the present estimate (∆Γ/Γ) Bs = 0.16 +0.11 −0.09 could be substantially improved by pinning down the value of ¯ Bs|(¯ b i s i) S−P (¯ b j s j) S−P |Bs and an accuracy of 10% in (∆Γ/Γ) Bs should eventually be reached. We briefly mention strategies to measure (∆Γ/Γ) Bs , and its implications for constraints on ∆M Bs , CKM parameters and the observation of CP violation in untagged Bs samples.
منابع مشابه
Lifetime difference of B s mesons - Theory status ‡
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