Measurements of CKM angle phi1 with charmless penguins at Belle

TL;DR

This paper reports measurements of CP violation parameters in B0 decays involving charmless penguin processes, using time-dependent analyses of large data samples collected at Belle, contributing to understanding CP violation in the quark sector.

Contribution

First time measurement of CP violation parameters in B0 decays to K0 pi0, Ks pi+ pi-, and Ks K+ K- using time-dependent Dalitz plot analyses at Belle.

Findings

Measured CP violation parameters consistent with Standard Model expectations.

Enhanced understanding of charmless penguin decay contributions.

Provided precise data for testing CKM angle phi1.

Abstract

We present measurements of time-dependent CP violation parameters in B0 --> K0 PI0, B0 --> Ks Pi+ Pi- and B0 --> Ks K+ K- decays. The latter two are extracted using time-dependent Dalitz plot analyses. These results are obtained from a large data sample that contains 657 x 10^6 BBbar pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.