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• W2950872974 abstract "We update the Standard-Model predictions for several quantities related to $B_s - bar B_s$ and $B_d - bar B_d$ mixing. The mass and width differences in the $B_s$ system read $ Delta M_s^{rm SM} = (17.3 pm 2.6) ps^{-1}$ and $Delta Gamma_s^{rm SM}= (0.087 pm 0.021) ps^{-1}$, respectively. The CP asymmetries in flavour-specific decays are $a_{rm fs}^{s,rm SM} = (1.9 pm 0.3) cdot 10^{-5}$ and $a_{rm fs}^{d,rm SM} = - (4.1 pm 0.6) cdot 10^{-4}$. We further critically discuss the sensitivity of $Delta Gamma_d$ to new physics and the uncertainties in the relation between $Delta Gamma_s$ and the branching fraction of $B_s to D_s^{(*)}{}^+ D_s^{(*)}{}^-$. Then we present a numerical update of the average width $Gamma_s$ in the $B_s$ system and correlate $Gamma_s$ with the $B^+$-$B_d$ lifetime ratio. Finally we summarise the key results of our recent global analysis with the CKMfitter collaboration addressing new physics in $B - bar B$-mixing. In an appropriately defined scenario parametrising new physics in $B - bar B$-mixing by two complex parameters $Delta_d$ and $Delta_s$ the Standard-Model point {$Delta_d=Delta_s=1$} is disfavoured by 3.6 standard deviations." @default.
• W2950872974 created "2019-06-27" @default.
• W2950872974 creator A5007986921 @default.
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• W2950872974 date "2011-02-21" @default.
• W2950872974 modified "2023-09-27" @default.
• W2950872974 title "Numerical updates of lifetimes and mixing parameters of B mesons" @default.
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