$CP$ violation in beauty and charm quarks at LHCb

Abstract

The LHCb experiment has been reporting remarkable $CP$-violation (CPV) measurements concerning the sectors of $b$ and $c$ quarks. Recently, the new measurements of time-integrated CPV with $D^0\to K^{+}{K}^{-}$ decays led to the first evidence ($3.8\sigma$) of CPV in a single charmed decay. The first search for CPV in the $D_{(s)}^{+}\to K^{+}{K}^{+}{K}^{-}$ decays was executed. The knowledge of the CKM parameter $\gamma$ was improved by new results; the current combination of the LHCb measurements is: ${\left(63.8_{-3.7}^{+3.5}\right)}^{\circ }$. The study of $B_s^0\to \varphi \varphi$ decays resulted in the most precise measurement of time-dependent CPV in any penguin-dominated $B$ meson decay. All the results are consistent with the Standard-Model predictions.

4 pages, 1 figure, contribution to the 2023 QCD session of the 57th Rencontres de Moriond