Mixing and $C\!P$ violation in charm decays at LHCb

TL;DR

This paper summarizes LHCb's latest measurements of charm meson mixing and $C ext{P}$ violation, including the first observation of mass difference in neutral charm mesons and precise asymmetry measurements.

Contribution

It presents the most recent and precise measurements of $D^0 - ar{D}^0$ mixing, direct $C ext{P}$ violation, and $C ext{P}$ violation in interference in charm decays from LHCb.

Findings

First observation of mass difference between neutral charm-meson eigenstates

Most precise measurement of time-dependent $C ext{P}$ asymmetry in $D^0$ decays

Evidence of $C ext{P}$ violation in charm sector

Abstract

The LHCb experiment has collected the world's largest sample of charmed hadrons. This sample is used to measure observables related to $D^0 -\overline{D}^0$ mixing, direct $C\!P$ violation and $C\!P$ violation in mixing and interference in the charm sector. In this document, the most recent results from LHCb on the search of direct $C\!P$ violation in $D^0$ and $D_{(s)}^+$ decays are summarised, as well as the first observation of mass difference between neutral charm-meson eigenstates and the most precise measurement of time-dependent $C\!P$ asymmetry in $D^0 \to K^+ K^-$ and $D^0 \to \pi^+ \pi^-$ decays.