Recent studies of CP violation in bottom meson decays at Belle

Abstract

We present a summary of recent studies on $CP$ violation with the Belle experiment using the final data sample of $772 \times 10^{6}$ B\bar{B} pairs produced at the Ypsilon(4S) resonance at the KEK asymmetric e^+ e^- collider. We discuss preliminary measurements of the branching fraction, the polarization and the $CP$ asymmetries of the decay $B^0 \rightarrow ρ^{+} ρ^{-}$ and an updated constraint on the CKM angle $ϕ_2$ from the $B\toρρ$ system. Being also related to $ϕ_2$, we present a preliminary measurement of the branching fraction of $B^0\rightarrow π^0π^0$ decays. Last, a preliminary model independent dalitz plot analysis of the decay $B^0 \rightarrow D^0[K_S^0π^+π^-]K^{*0}$ is presented and its sensitivity to the CKM angle $ϕ_3$ is discussed.

To appear in the proceedings of the European Physical Society Conference on High Energy Physics 2015 (EPS-HEP 2015), Vienna, Austria, 22nd to 29th of July 2015