Measurement of the difference of time-integrated $CP$ asymmetries in $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$ decays

We present precision measurement of difference time-integrated $CP$ asymmetries, $\Delta A_{CP}$, in singly Cabibbo-suppressed modes $D^0 \to K^+K^-$ and $D^0 \to \pi^+\pi^-$, based on the full Run I LHCb data sample, corresponding to an integrated luminosity of $3\mathrm{fb}^{-1}$.