Recent CP Violation Studies with BABAR

TL;DR

This paper reports on recent searches for CP violation in charm decays using the full BABAR dataset, providing measurements that test the Standard Model's predictions and explore potential new physics effects.

Contribution

It presents new measurements of CP violation parameters in charm decays, utilizing the complete BABAR dataset, and applies novel analysis techniques for T-odd correlations.

Findings

Measured $A_{CP}$ in $D^ o ext{K}_S ext{π}^ o$ decay as -0.39% with uncertainties.

Found CP violation signals consistent with zero within uncertainties in T-odd correlations.

Provided the most precise measurements of CP violation in these charm decay modes to date.

Abstract

In this proceeding, results of searches for CP violation in charm decays using the full BABAR dataset are discussed. The parameter $A_{CP}$ in the decay $D^\pm\to\KS\pi^\pm$ is determined to be $(-0.39 \pm 0.13 \pm 0.10)%$. Meaurements of CP violation using \T-odd correlations in the four-body decays D^+->K^+K_S^0\pi^+\pi^- and D^+_s->K^+K_S^0\pi^+\pi^- are $(-12.0 \pm 10.0_{\stat} \pm 4.6_{\syst}) \times 10^{-3}$ and $(-13.6 \pm 7.7_{\stat} \pm 3.4_{\syst}) \times10^{-3}$, respectively.