Measurement of the $CP$ violation parameter $A_{\Gamma }$ in $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$ decays

LHCb collaboration, R. Aaij, B. Adeva +769

Asymmetries in the time-dependent rates of $D^0\to K^{+}{K}^{-}$ and $D^0\to {\pi }^{+}{\pi }^{-}$ decays are measured in a $pp$ collision data sample collected with the LHCb detector during LHC Run…