Numerical updates of lifetimes and mixing parameters of B mesons

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 $\mathrm{\Delta }{M}_s^{\mathrm{S}\mathrm{M}}=(17.3\pm 2.6)p{s}^{-1}$ and $\mathrm{\Delta }{\mathrm{\Gamma }}_s^{\mathrm{S}\mathrm{M}}=(0.087\pm 0.021)p{s}^{-1}$, respectively. The CP asymmetries in flavour-specific decays are $a_{\rm fs}^{s,\rm SM} = (1.9 \pm 0.3) \cdot 10^{-5}$and$a_{\rm fs}^{d,\rm SM} = - (4.1 \pm 0.6) \cdot 10^{-4}$\mathrm{.}Wefurthercriticallydiscussthesensitivityof$\Delta \Gamma_d$ to new physics and the uncertainties in the relation between $\mathrm{\Delta }{\mathrm{\Gamma }}_s$ and the branching fraction of $B_s\to D_s^{(\ast )}{}^{+}{D}_s^{(\ast )}{}^{-}$. Then we present a numerical update of the average width ${\mathrm{\Gamma }}_s$ in the $B_s$ system and correlate ${\mathrm{\Gamma }}_s$ 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 ${\mathrm{\Delta }}_d$ and ${\mathrm{\Delta }}_s$ the Standard-Model point {${\mathrm{\Delta }}_d={\mathrm{\Delta }}_s=1$} is disfavoured by 3.6 standard deviations.