CP violation in beauty and charm

TL;DR

This paper reviews recent precision measurements of CP violation in beauty and charm hadrons, testing the Standard Model and exploring potential new physics, including first evidence in beauty baryons and precise charm sector results.

Contribution

It presents new measurements of CP violation, including the first evidence in beauty baryons and the most precise results in the charm system, based on LHC Run 1 data.

Findings

First evidence of CP violation in beauty baryons

Most precise measurement of CP violation in charm system

Consistency with Standard Model predictions

Abstract

The study of $C\!P$ violation in decays of beauty- and charm-hadrons provides a fundamental test of the predictions of the Standard Model (SM) and represents a sensitive probe to search for physics effects that cannot be described within the SM. In these proceedings, precision measurements are presented of several observables related to the so-called unitary triangles, that arise from the unitarity requirements on the 3x3 Cabibbo-Kobayashi-Maskawa matrix describing the quark mixing. Moreover, recent measurements of $C\!P$ violation in beauty- and charm-hadrons are illustrated. In particular, a recent analysis providing the first evidence for $C\!P$ violation in the beauty baryon sector and the world best precise measurement of $C\!P$ violation in the charm system will be described in detail. The discussed analyses are based on proton-proton collision data collected during 2011 and 2012 (LHC Run 1) by the ATLAS, CMS and LHCb experiments.