Observation of an Excited Charm Baryon $Ω_{c}^{*}$ Decaying to $Ω_{c}^{0} γ$

Open Access

We report the first observation of an excited singly charmed baryon

Ω_{c}^{*}

(

c s s

) in the radiative decay

Ω_{c}^{0} γ

, where the

Ω_{c}^{0}

baryon is reconstructed in the decays to the final states

Ω^{-} π^{+}

Ω^{-} π^{+} π^{0}

Ω^{-} π^{+} π^{-} π^{+}

, and

Ξ^{-} K^{-} π^{+} π^{+}

. This analysis is performed using a data set of

230.7 {fb}^{- 1}

collected by the BABAR detector at the PEP-II asymmetric-energy

B

factory at the Stanford Linear Accelerator Center. The mass difference between the

Ω_{c}^{*}

and the

Ω_{c}^{0}

baryons is measured to be

70.8 \pm 1.0 (stat) \pm 1.1 (syst) MeV / c^{2}

. We also measure the ratio of inclusive production cross sections of

Ω_{c}^{*}

and

Ω_{c}^{0}

e^{+} e^{-}

annihilation.

This publication has 13 references indexed in Scilit:

Observation of an Excited Charm BaryonΩc*Decaying toΩc0γ