Summary of Working Group 4: Mixing and mixing-related $CP$ violation in the $B$ system: $\Delta m$, $\Delta \Gamma$, $\phi_s$, $\phi_{1}/\beta$, $\phi_{2}/\alpha$, $\phi_{3}/\gamma$

TL;DR

This paper reviews recent theoretical and experimental advances in understanding B meson mixing and related CP violation parameters, summarizing progress presented at the CKM 2021 workshop.

Contribution

It provides a comprehensive summary of the latest developments in B meson mixing properties and CP violation measurements from the CKM 2021 workshop.

Findings

Updated measurements of B meson mixing parameters

Improved constraints on CP violation phases

Progress in theoretical modeling of B mixing

Abstract

This summary reviews contributions to the CKM 2021 workshop in Working Group 4. In particular, theoretical and experimental progress in determining $B$ meson mixing properties are discussed.