Measurements of the Branching Fraction and CP-Violating Asymmetries of B0 --> K0S Pi0 Decays

TL;DR

This paper reports measurements of the branching fraction and CP-violating asymmetries in B0 --> K0S Pi0 decays, providing insights into CP violation and testing the Standard Model using data from the BaBar experiment.

Contribution

First measurement of branching fraction and CP asymmetries in B0 --> K0S Pi0 decays with a large data sample from BaBar.

Findings

Branching fraction B(B0 --> K0 Pi0) = (11.4 +/- 0.9 +/- 0.6) x 10^{-6}

Direct CPV asymmetry C = 0.06 +/- 0.18 +/- 0.06

CPV asymmetry in interference S = 0.35 +0.30/-0.33 +/- 0.04

Abstract

We present measurements of the branching fraction and time-dependent CP-violating (CPV) asymmetries in B0 --> K0S Pi0 decays based on 227 million Y(4S) --> BBbar decays collected with the BaBar detector at the PEP-II asymmetric-energy B factory at SLAC. We obtain a branching fraction B(B0 --> K0 Pi0) = (11.4 +/- 0.9 +/- 0.6) x 10^{-6}, the magnitude of the direct CPV asymmetry C = 0.06 +/- 0.18 +/- 0.06 and the magnitude of the CPV asymmetry in the interference between mixing and decay S = 0.35 +0.30/-0.33 +/- 0.04, where the first error is statistical and the second systematic. All results are preliminary.