Simultaneous determination of CKM angle $\gamma$ and charm mixing parameters

A combination of measurements sensitive to the $CP$ violation angle $\gamma$ of the Cabibbo--Kobayashi--Maskawa (CKM) unitarity triangle and to the charm mixing parameters that describe oscillations between $D^0$ and $\overline{D}^0$ mesons is performed. Results from the charm and beauty sectors, based on data collected with the LHCb detector at CERN's Large Hadron Collider, are included together for the first time. This method provides an improvement on the precision of the charm mixing parameter $y$ by a factor of two with respect to the current world average. The charm mixing parameters are determined to be $x = (0.400^{+0.052}_{-0.053})\%$ and $y = (0.630^{+0.033}_{-0.030})\%$, which are the most precise measurements to date. The CKM angle $\gamma$ is found to be $\gamma = (65.4^{+3.8}_{-4.2})^\circ$, superseding the previous LHCb result, and is the most precise determination from a single experiment.