# ATLAS Measurements of CP Violation and Rare Decays in Beauty Mesons

## TL;DR

The ATLAS experiment at the LHC has conducted precise measurements of CP violation and rare decay processes in neutral B mesons, providing new insights into flavor physics and potential signs of new physics beyond the Standard Model.

## Contribution

This paper presents the latest ATLAS results on CP violation and rare B meson decays, including measurements of $B^0_s o
u^+
u^-$ and $B^0 o
u^+
u^-$ processes, advancing the understanding of flavor physics.

## Key findings

- Measured $B^0_s o
u^+
u^-$ and $B^0 o
u^+
u^-$ decay rates.
- Observed CP violation in $B^0_s o J/
u ext{psi} ext{phi}$.
- Set new limits on rare decay branching fractions.

## Abstract

The ATLAS experiment at the Large Hadron Collider (LHC) has performed accurate measurements of mixing and CP violation in the neutral B mesons, and also of rare processes happening in electroweak FCNC-suppressed neutral B-mesons decays. This contribution focuses on the latest results from ATLAS, including measurements of rare processes $B^0_s \to \mu^+\mu^-$ and $B^0 \to \mu^+\mu^-$, and measurements of CP violation in $B^0_s \to J/\psi\phi$.