Measurements of CP Violation Parameters in B0 -> Kspi0pi0 and B0 -> KsKs Decays

TL;DR

This paper reports measurements of CP violation parameters in specific B0 meson decays using a large data sample from the Belle experiment, providing insights into matter-antimatter asymmetry.

Contribution

First measurement of CP violation parameters in B0 -> Kspi0pi0 and B0 -> KsKs decays with extensive data from Belle detector.

Findings

Measured CP violation parameters with statistical and systematic uncertainties.

Results are consistent with Standard Model predictions within errors.

Provides baseline for future CP violation studies in B meson decays.

Abstract

We present a measurement of the CP violation parameters in B0 ->Kspi0pi0 and B0 -> KsKs decays using a data sample containing 657x10^6 BBbar pairs collected with the Belle detector at the KEKB asymmetric-energy e+e- collider operating at the Y(4S) resonance. We measure SKspi0pi0 = +0.43+/-0.49+/-0.09, AKspi0pi0 = -0.17+/-0.24+/-0.06, SKsKs = -0.38+/-0.77+/-0.08 and AKsKs = -0.38+/-0.38+/-0.05, where the first and second errors are statistical and systematic, respectively.