Observation of Excited $\hat{I}{\text{c◯}}_c$ Charmed Baryons in $e^{+}{e}^{-}$ Collisions

Abstract

Using the entire Belle data sample of 980 ${\mathrm{fb}}^{-1}$ of $e^{+}{e}^{-}$ collisions, we present the results of a study of excited $\hat{I}{\text{c◯}}_c$ charmed baryons in the decay mode $\hat{I}{ž}_c^{+}{K}^{-}$. We show confirmation of four of the five narrow states reported by the LHCb Collaboration: the $\hat{I}{\text{c◯}}_c(3000)$ , $\hat{I}{\text{c◯}}_c(3050)$, $\hat{I}{\text{c◯}}_c(3066)$, and $\hat{I}{\text{c◯}}_c(3090)$.