Study of \Omega_c^0 and \Omega_c^{*0} Baryons at Belle

TL;DR

This paper reports precise measurements of the masses and mass difference of the \\Omega_c^0 and \\Omega_c^{*0} baryons using data from the Belle experiment, providing valuable insights into charmed baryon spectroscopy.

Contribution

First measurement of the \\Omega_c^{*0} mass difference with high precision using Belle data, advancing understanding of charmed baryon properties.

Findings

Mass of \\Omega_c^0 measured as 2693.6 MeV/c^2

Mass difference between \\Omega_c^{*0} and \\Omega_c^0 is 70.7 MeV/c^2

Analysis used 673 fb^{-1} of data from Belle detector

Abstract

We report results from a study of the charmed double strange baryons \Omega_c^0 and \Omega_c^{*0} at Belle. The \Omega_c^0 is reconstructed using the \Omega_c^0 --> \Omega^- \pi^+ decay mode, and its mass is measured to be (2693.6 \pm 0.3 {+1.8 \atop -1.5}) MeV/c^2. The \Omega_c^{*0} baryon is reconstructed in the \Omega_c^0 \gamma mode. The mass difference M_{\Omega_c^{*0}} - M_{\Omega_c^0} is measured to be (70.7 \pm 0.9 {+0.1 \atop -0.9}) MeV/c^2. The analysis is performed using 673 fb^{-1} of data on and near the \Upsilon(4S) collected with the Belle detector at the KEKB asymmetric-energy e^+e^- collider.