We report the first observation of an excited singly charmed baryon Ωc* (css) in the radiative decay Ωc0γ, where the Ωc0 baryon is reconstructed in the decays to the final states Ω-π+, Ω-π+π0, 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 Ωc* and the Ωc0 baryons is measured to be 70.8±1.0(stat)±1.1(syst)  MeV/c2. We also measure the ratio of inclusive production cross sections of Ωc* and Ωc0 in e+e- annihilation.

Observation of an Excited Charm Baryon Ωc* Decaying to Ωc0γ

SIMI, GABRIELE;GAZ A;MARGONI, MARTINO;SIMONETTO, FRANCO;STROILI, ROBERTO;VOCI, CESARE;
2006

Abstract

We report the first observation of an excited singly charmed baryon Ωc* (css) in the radiative decay Ωc0γ, where the Ωc0 baryon is reconstructed in the decays to the final states Ω-π+, Ω-π+π0, 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 Ωc* and the Ωc0 baryons is measured to be 70.8±1.0(stat)±1.1(syst)  MeV/c2. We also measure the ratio of inclusive production cross sections of Ωc* and Ωc0 in e+e- annihilation.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11577/125739
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