Observation of $CP$ violation in charm decays

LHCb collaboration, R. Aaij, C. Abellán Beteta +848

A search for charge-parity ($CP$) violation in $D^0\to K^{-}{K}^{+}$ and $D^0\to {\pi }^{-}{\pi }^{+}$ decays is reported, using $pp$ collision data corresponding to an integrated luminosity of…