Search for B^0-> p p-bar, Lambda Lambda-bar and B^+ -> p Lambda-bar at Belle

TL;DR

This study searched for specific baryonic B meson decays using Belle data but found no significant signals, setting new upper limits on their branching fractions.

Contribution

It provides the most sensitive upper limits to date on the branching fractions of B^0 and B^+ decays to baryonic final states.

Findings

No significant signals observed for the decays.

Set new upper limits on branching fractions.

Improved sensitivity over previous measurements.

Abstract

We report on a new search for two-body baryonic decays of the B meson. Improved sensitivity compared to previous Belle results is obtained from 414 fb^-1 of data that corresponds to 449 million B B-bar pairs, which were taken on the Upsilon(4S) resonance and collected with the Belle detector at the KEKB e^+e^- collider. No significant signals are observed and we set the 90% confidence level upper limits: Br(B^0-> p pbar) <1.1X10^-7, Br(B^0-> Lambda Lambda-bar) < 3.2X10^-7 and Br(B^+-> p Lambda-bar) < 3.2X10^-7.