Lifetime difference of Bs mesons - Theory status
Martin Beneke, Alexander Lenz
Abstract
We give an update on the lifetime difference of Bs mesons which accounts for recent lattice bag parameter results, and obtain (ΔΓ/Γ)Bs=(9.3+3.4-4.6)%. We then review the current theoretical uncertainties and conclude with a pessimistic perspective on further improvements.
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