Measurements of CP Violation in B Meson decays at Belle

TL;DR

This paper reports recent measurements of time-dependent CP violation, CPT violation, and a new radiative penguin decay in B meson decays using the full Belle dataset, providing insights into CP violation phenomena.

Contribution

The paper presents the first observation of a new b->s radiative penguin decay and comprehensive measurements of CP and CPT violation parameters in B meson decays.

Findings

Measured CP violation parameters in b->c c-bar s and b->c c-bar d decays.

Reported the first observation of B^0-> K^0     decay.

Provided measurements of time-dependent CP asymmetry in the new decay mode.

Abstract

In this proceeding, we report the recent measurements of time-dependent CP violation in B meson decays from the Belle Collaboration. The Belle experiment stopped operation in June 2010 and collected nearly 772 x 10^6 B B-bar pairs at the \Upsilon(4S) resonance at the KEKB asymmetric-energy e^+e^- collider. We used this full data sample to measure the CP violation parameters in b->c c-bar s and b->c c-bar d decays. We also report new measurements of CPT violation parameters in B decays. Furthermore, we report the first observation of a new b->s radiative penguin decay B^0->\phi K^0 \gamma, as well as measurements of its time-dependent CP asymmetry.