# Search for $\Omega(2012)\to K\Xi(1530) \to K\pi\Xi$ at Belle

## TL;DR

This study searches for the decay of the $ ext{Omega}(2012)$ baryon into $K o ext{pi} o ext{Xi}$ using Belle data, finding no significant signals and setting upper limits on decay ratios.

## Contribution

First search for the $ ext{Omega}(2012)$ decay into $K o ext{pi} o ext{Xi}$ at Belle, providing constraints on theoretical models.

## Key findings

- No significant $ ext{Omega}(2012)$ signals observed.
- Established 90\% credibility level upper limits on decay ratios.
- Results constrain models predicting $ ext{Omega}(2012)$ as a $K ext{Xi}(1530)$ molecule.

## Abstract

Using data samples of $e^+e^-$ collisions collected at the $\Upsilon(1S)$, $\Upsilon(2S)$, and $\Upsilon(3S)$ resonances with the Belle detector, we search for the three-body decay of the $\Omega(2012)$ baryon to $K\pi\Xi$. This decay is predicted to dominate for models describing the $\Omega(2012)$ as a $K\Xi(1530)$ molecule. No significant $\Omega(2012)$ signals are observed in the studied channels, and 90\% credibility level upper limits on the ratios of the branching fractions relative to $K \Xi$ decay modes are obtained.