Observation of the $\Omega_{c}^{0}$ Charmed Baryon at CLEO

TL;DR

This paper reports the first observation of the $oldsymbol{ ext{Omega}_c^0}$ charmed baryon at CLEO, using 13.7 fb$^{-1}$ of data, identifying a significant signal at around 2695 MeV/$c^2$ across multiple decay modes.

Contribution

The study provides the first experimental evidence of the $ ext{Omega}_c^0$ baryon in $e^{+}e^{-}$ collisions, measuring its mass and observing it in several decay channels.

Findings

Observed a signal of 40.4±9.0 events.

Measured the $ ext{Omega}_c^0$ mass as 2694.6±2.6(stat)±1.9(syst) MeV/$c^2$.

Confirmed the existence of the $ ext{Omega}_c^0$ baryon.

Abstract

The CLEO experiment at the CESR collider has used 13.7 fb$^{-1}$ of data to search for the production of the $\Omega_c^0$ (css-ground state) in $e^{+}e^{-}$ collisions at $\sqrt{s} \simeq 10.6$ {\rm GeV}. The modes used to study the $\Omega_c^0$ are $\Omega^- \pi^+$, $\Omega^- \pi^+ \pi^0$, $\Xi^- K^- pi^+ \pi^+$, $\Xi^0 K^- pi^+$, and $\Omega^- \pi^+ \pi^- \pi^+$. We observe a signal of 40.4$\pm$9.0(stat) events at a mass of 2694.6$\pm$2.6(stat)$\pm$1.9(syst) {\rm MeV/$c^2$}, for all modes combined.