Search for Exclusive Rare Baryonic Decays of $B$ Mesons

TL;DR

This study searches for rare baryonic B meson decays using data from the CLEO detector but finds no significant signals, setting upper limits on their branching fractions.

Contribution

First search for specific rare baryonic B decay modes, establishing upper limits on their branching fractions with CLEO data.

Findings

No statistically significant signals detected.

Set upper limits on branching fractions.

Contributes to understanding rare B decays.

Abstract

We report the results of a search for the rare baryonic decay modes B -> Lambda Lambdabar, B -> Lambdabar p, B -> Lambdabar p pi, and B -> p pbar using 5.8M BBbar pairs collected with the CLEO detector. We see no statistically significant signals in any of these modes and set 90% confidence level upper limits on their branching fractions, B(B -> Lambda Lambdabar) < 3.9 \times 10^{-6}, B(B -> Lambdabar p) < 2.6 \times 10^{-6}, B(B -> Lambdabar p pi) < 1.3 \times 10^{-5}, and B(B -> p pbar) < 7.0 \times 10^{-6}.