Search for CP violation in $D^0\to h^{+}{h}^{-}$ decays at CDF

I report on a measurement of \CP-violating asymmetries ($A_{\mathrm{\Gamma }}$) between effective lifetimes of $D^0$ or ${\bar{D}}^0$ in fully reconstructed $D^0\to K^+ K^-$and$D^0\to \pi^+\pi^-$decayscollectedin$p\bar{p}$ collisions by the Collider Detector at Fermilab experiment. The full CDF data set corresponding to $9.7$ fb${}^{-1}$ of integrated luminosity is used. The flavor of the charm meson at production is determined by exploiting the strong-interaction decay $D^{\ast +}\to D^0{\pi }^{+}$, while the contamination from mesons originated in $b$-hadron decays is evaluated and subtracted from the sample. Signal yields as functions of the observed decay-time distributions are extracted from maximum likelihood fits and used to measure the asymmetries. The results, $A_\Gamma (K^+K^-) = \bigl(-1.9 \pm 1.5 $(\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{t})$ \pm 0.4 $(\mathrm{s}\mathrm{y}\mathrm{s}\mathrm{t})$ \bigr)\times10^{-3}$and$A_\Gamma (\pi^+\pi^-)= \bigl(-0.1 \pm 1.8 $(\mathrm{s}\mathrm{t}\mathrm{a}\mathrm{t})$ \pm 0.3 $(\mathrm{s}\mathrm{y}\mathrm{s}\mathrm{t})$ \bigr)\times10^{-3}$, and their combination, $A_{\mathrm{\Gamma }}=(-1.2\pm 1.2)\times {10}^{-3}$, are consistent with the SM predictions and other experimental determinations.