Search for B+ -> J/psi eta' K+ and B0 -> J/psi eta' Ks0 Decays

TL;DR

This study searches for specific B meson decay modes involving J/psi, eta', and kaons, but finds no significant signals and sets upper limits on their branching fractions.

Contribution

First search for B+ -> J/psi eta' K+ and B0 -> J/psi eta' Ks0 decays with a large data sample, establishing upper limits on their branching fractions.

Findings

No significant signals observed for the decay modes.

Upper limits on branching fractions are set at 8.8 x 10^-5 and 2.5 x 10^-5.

Sample size of 388 million BBbar pairs used in the analysis.

Abstract

We report the results of searches for B+ -> J/psi eta' K+ and B0 -> J/psi eta' Ks0 decays, using a sample of 388 x 10^6 BBbar pairs collected with the Belle detector at the Upsilon(4S) resonance. No statistically significant signal is found for either of the two decay modes and upper limits for the branching fractions are determined to be B(B+ -> J/psi eta' K+) < 8.8 x 10^-5 and B(B0 -> J/psi eta' Ks0) < 2.5 x 10^-5 at 90% confidence level.