MEASUREMENT OF THE CHARM-MIXING AND CP VIOLATION PARAMETER yCP AT LHCb

The recent discovery of CP violation in D-0 mesons by the LHCb experiment raised theoretical and experimental interest. It is still unclear whether this result is compatible with the Standard-Model predictions and there is a consensus on the need for further measurements to clarify the picture. The LHCb experiment is therefore conducting a wide range of searches for CP violation in the charm sector using multiple observables. Among those, y CP is sensitive to CP violation in the mixing of D-0 mesons and is sensitive to physics beyond the Standard Model. By measuring the difference between the effective-decay widths of the D-0 meson and its anti-particle to CP eigenstates, the CP violation in the D-0 meson time evolution can be probed. This communication reports the latest measurements of y(CP) from LHCb as well as prospects for the LHCb Upgrade, which will take data during Runs 3 and 4 of the LHC.