Excited ${\Omega }_c$ baryons as 2S states

Abstract

The LHCb experiment has recently reported two excited ${\Omega }_c$ resonances decaying to ${\Xi }_c^{+}{K}^{-}$, with masses about 3185 and 3327 MeV. We discuss their assignment to $2S_{1/2}$ and $2S_{3/2}$ states, which can be compared with masses based on extrapolation from the observed 1S states. The agreement is not perfect, but weighs against an earlier alternative assignment.

Comments: 4 pages