Search for Two-Body $B$ Meson Decays to $\Lambda^{0}$ and $\Omega^{(*)0}_{c}$

TL;DR

This study conducted the first search for specific two-body decays of neutral B mesons into baryons, finding no evidence and setting upper limits on their branching fractions using a large data sample.

Contribution

It provides the first experimental search and upper limits for baryon-number-violating two-body B meson decays into $ ext{Lambda}^0$ and $ ext{Omega}^{(*)0}_c$ baryons.

Findings

No evidence of the targeted decays was observed.

Set 95% confidence-level upper limits on branching fractions.

Limits range between 9.5×10^{-8} and 31.2×10^{-8}.

Abstract

We report the results of the first search for Standard Model and baryon-number-violating two-body decays of the neutral $B$ mesons to $\Lambda^{0}$ and $\Omega^{(*)0}_c$ using 711~${\rm fb^{-1}}$ of data collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. We observe no evidence of signal from any such decays and set 95\% confidence-level upper limits on the products of $B^0$ and $\bar{B}^0$ branching fractions for these two-body decays with $\mathcal{B}(\Omega_{c}^{0} \to \pi^+ \Omega^-)$ in the range between 9.5~$\times 10^{-8}$ and 31.2~$\times 10^{-8}$.