Measurement of time dependent CP asymmetry parameters in B0 meson decays to omega K0S, eta'K0, and pi0K0S

TL;DR

This paper reports measurements of time-dependent CP asymmetry parameters in B0 meson decays to specific final states, using the full BABAR dataset, and finds results consistent with previous measurements and the world average.

Contribution

First measurement of CP asymmetry parameters in B0 decays to omega K0S, eta'K0, and pi0K0S using the complete BABAR dataset, enhancing understanding of CP violation.

Findings

Measured CP parameters with statistical and systematic uncertainties.

Results consistent with previous measurements and the world average.

Provides new data for testing the Standard Model's CP violation predictions.

Abstract

We present measurements of the time-dependent CP-violation parameters S and C in the decays omega K0S, eta'K0, reconstructed as eta'K0S and eta'K0L, and pi0K0S. The data sample corresponds to the full BABAR dataset of 467 x 10^6 BB pairs produced at the PEP-II asymmetric-energy e+e- collider at the Stanford Linear Accelerator Center. The results are S_{omega K0S} = 0.55^{+0.26}_{-0.29} +/- 0.02, C_{omega K0S} = -0.52^{+0.22}_{-0.20} +/- 0.03, S_{eta' K0} = 0.57 +/- 0.08 +/- 0.02, C_{eta' K0} = -0.08 +/- 0.06 +/- 0.02, S_{pi0 K0S} = 0.55 +/- 0.20 +/- 0.03, and C_{pi0 K0S} = 0.13 +/- 0.13 +/- 0.03, where the first errors are statistical and the second systematic. These results are consistent with our previous measurements and the world average of sin2beta measured in B0 -> J/psi K0S.