CP violation measurements in b hadrons at LHCb

TL;DR

This paper presents the latest LHCb measurements of CP violation in b hadrons, including new results on decay parameters, constraints on the CKM angle gamma, and evidence for CP violation in baryonic matter, all consistent with the Standard Model.

Contribution

It reports the first measurements of certain CP violation parameters in specific decay modes and provides updated constraints on the CKM angle gamma, advancing experimental understanding of CP violation.

Findings

First measurement of $_s^{car{c}s}$ in a tensor resonance dominated final state

Most precise measurements of $C_{\pi^+\pi^-}$ and $S_{\pi^+\pi^-}$ to date

First evidence for CP violation in baryonic matter at 3.3$\sigma$ level

Abstract

In the present document a selected sample of the latest results on CP violation by the LHCb collaboration are presented. These include the first measurement of $\phi_s^{c\overline{c}s} = 0.119 \pm0.107\pm0.034$ rad in a final state dominated by a tensor resonance, the most precise measurements of $C_{\pi^+\pi^-}$ and $S_{\pi^+\pi^-}$ to date, the first values ever measured of $C_{K^+K^-}$, $S_{K^+K^-}$ and $A_{K^+K^-}^{\Delta\Gamma}$, the latest constraints on $\gamma = (76.8^{+5.1}_{-5.7})^\circ$ from the combination of several LHCb results and the first evidence for CP violation in baryonic mater at the level of 3.3$\sigma$. All results show a good agreement with the SM expectations.