CP violation in charm decays in LHCb

The LHCb experiment has collected the world’s largest sample of charmed hadrons. With this sample, $CP$ violation has been observed for the first time in $D$$^{0}$ mesons decays. Because of the large uncertainty on theoretical predictions, additional measurements on different charm decays are needed for a better understanding of the physics picture. The $D$$^{0}$ → $K$$^{0}_{s}$ $K$$^{0}_{s}$ decay is a perfect channel for the study of $CP$ violation. A prediction based on the Standard Model gives an upper limit for the $CP$ asymmetry of about 1% and further enhancements could result from contributions from physics beyond the Standard Model. The latest measurement on this channel, performed by the LHCb collaboration using data collected in 2015 and 2016, is discussed in this document.