Constraints on new physics in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>B</mml:mi><mml:mo>−</mml:mo><mml:mover accent="true"><mml:mi>B</mml:mi><mml:mo>¯</mml:mo></mml:mover></mml:math>mixing in the light of recent LHCb data

We perform model-independent statistical analyses of three scenarios accommodating new physics (NP) in $\ensuremath{\Delta}F=2$ flavor-changing neutral current amplitudes. In a scenario in which NP in ${B}_{d}\ensuremath{-}{\overline{B}}_{d}$ mixing and ${B}_{s}\ensuremath{-}{\overline{B}}_{s}$ mixing is uncorrelated, we find the parameter point representing the standard model disfavored by 2.4 standard deviations. However, recent LHCb data on ${B}_{s}$ neutral meson mixing forbid a good accommodation of the D\O{} data on the semileptonic $CP$ asymmetry ${A}_{\mathrm{SL}}$. We introduce a fourth scenario with NP in both ${M}_{12}^{d,s}$ and ${\ensuremath{\Gamma}}_{12}^{d,s}$, which can accommodate all data. We discuss the viability of this possibility and emphasize the importance of separate measurements of the $CP$ asymmetries in semileptonic ${B}_{d}$ and ${B}_{s}$ decays. All results have been obtained with the CKMfitter analysis package, featuring the frequentist statistical approach and using Rfit to handle theoretical uncertainties.