CP violation in $B^0_{(s)} \to h+h−$ decays

The time-dependent CPV direct and mixing-induced asymmetries in $B^0 \to \pi^+ \pi^-$ and $B_s \to K^+ K^-$ decays have been measured at the LHCb experiment using data collected during Run1 at centre-of-mass energies of 7 and 8 TeV, corresponding to 3fb$^{-1}$. The data set was also used for a measurement of time-integrated CP asymmetries in $B^0 \to K^+ \pi^-$ and $B_s \to \pi^+ K^-$ decays.The results obtained supersede those of B factories with much higher precision. No other experiment has ever measured CP violation in $B_s \to K^+ K^-$ decays. The measurements of the time-integrated CP asymmetries are the most precise from a single experiment to date.