Searches for B0 decays to eta K0, eta eta, eta' eta', eta phi, and eta' phi

TL;DR

This study searches for specific B0 meson decay modes into eta, eta', K0, and phi mesons, providing measurements and upper limits on their branching fractions using data from the BaBar detector.

Contribution

First measurements and upper limits of branching fractions for B0 decays into eta, eta', K0, and phi mesons based on a large data sample.

Findings

Measured branching fractions with statistical and systematic uncertainties.

Set upper limits at 90% confidence level for several decay modes.

Provided new constraints on B0 decay processes.

Abstract

We search for B0 meson decays into two-body combinations of K0, eta, eta', and phi mesons in 324 million B Bbar pairs collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We measure the following branching fractions (upper limits at 90% confidence level) in units of 10^{-6}: Br(B0->eta K0) =1.8+0.7-0.6 +-0.1(2.9), Br(B0->eta eta)=1.1+0.5-0.4 +-0.1(1.8), Br(B0->eta phi)=0.1+-0.2 +-0.1(0.6), Br(B0->eta' phi)=0.2+0.4-0.3 +-0.1(1.0), Br(B0->eta' eta')=1.0+0.8-0.6 +-0.1(2.4), where the first error is statistical and the second systematic.