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 230.7fb-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.

Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Observation of an excited charm baryon Ωc* decaying to Ωc0γ. PHYSICAL REVIEW LETTERS, 97(23) [10.1103/PhysRevLett.97.232001].

Observation of an excited charm baryon Ωc* decaying to Ωc0γ

CARPINELLI, Massimo;
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 230.7fb-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.
Articolo in rivista - Articolo scientifico
Gamma rays; High energy physics; Linear accelerators; Particle detectors; Radioactivity; Asymmetric energy; Mass difference; Radiative decay; Elementary particles;
English
B. Aubert et al. (BABAR Collaboration)
Aubert, B., Bona, M., Boutigny, D., Couderc, F., Karyotakis, Y., Lees, J., et al. (2006). Observation of an excited charm baryon Ωc* decaying to Ωc0γ. PHYSICAL REVIEW LETTERS, 97(23) [10.1103/PhysRevLett.97.232001].
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