Measurements of time-dependent CP violation in $B^0 \to \omega K_S^0$, $f_0(980) K_S^0$, $K_S^0 \pi^0$ and $K^+ K^- K_S^0$ decays

TL;DR

This paper reports measurements of time-dependent CP violation in various B meson decay modes using a large data sample collected at the Belle experiment, providing insights into CP asymmetries in these processes.

Contribution

First measurement of time-dependent CP asymmetries in multiple B decay channels using the Belle detector with 535 million B pairs.

Findings

Measured CP asymmetries in four decay modes.

Provided constraints on CP violation parameters.

Enhanced understanding of CP violation in B meson decays.

Abstract

We present measurements of time-dependent CP asymmetries in $B^0 \to \omega K_S^0$, $f_0 (980) K_S^0$, $K_S^0 \pi^0$ and $K^+ K^- K_S^0$ based on a sample of 535 $\times 10^6$ $B\bar{B}$ pairs collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB energy-asymmetric $e^+ e^-$ collider. One neutral $B$ meson is fully reconstructed in one of the specified decay channels, and the flavor of the accompanying $B$ meson is identified from its decay products. CP-violation parameters for each of the decay modes are obtained from the asymmetries in the distributions of the proper-time intervals between the two B decays.