Measurement of $CP$ observables in $B^{\pm }\to D{K}^{\pm }$ and $B^{\pm }\to D{\pi }^{\pm }$ with $D\to K_{\mathrm{S}}^0{K}^{\pm }{\pi }^{\mp }$ decays

Measurements of $CP$ observables in $B^{\pm }\to D{K}^{\pm }$ and $B^\pm \to D \pi^\pm$decaysarepresented,where$D$representsasuperpositionof$D^0$and$\bar{D}^0$states\mathrm{.}The$D$ meson is reconstructed in the three-body final state $K_{\mathrm{S}}^0{K}^{\pm }{\pi }^{\mp }$. The analysis uses samples of $B$ mesons produced in proton-proton collisions, corresponding to an integrated luminosity of 1.0, 2.0, and 6.0 fb${}^{-1}$ collected with the LHCb detector at centre-of-mass energies of $\sqrt{s}=$ 7, 8, and 13 TeV, respectively. These measurements are the most precise to date, and provide important input for the determination of the CKM angle $\gamma$.