Search for B^- --> J/psi Lambda p-bar decay

TL;DR

This study searched for the rare decay of B- mesons into J/psi, Lambda, and p-bar particles but found no significant signal, setting an upper limit on its branching fraction.

Contribution

First search for the B- --> J/psi Lambda p-bar decay, establishing an upper limit on its branching fraction using Belle data.

Findings

No significant signal observed.

Branching fraction upper limit set at 4.1 x 10^-5.

Provides constraints for theoretical models.

Abstract

We report the results of a search for $B^{-} \to \jpsi \Lambda \pbar$ based on a data set of 78 fb$^{-1}$ data collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric $e^+ e^-$ collider. No substantial signal is found, and we set the branching fraction upper limit ${\cal B}(B^{-} \to \jpsi \Lambda \pbar) < 4.1 \times 10^{-5}$ at 90% confidence level.