Observation of an Excited Charm Baryon OmegaC* Decaying to OmegaC0 Gamma

Details Observation of an Excited Charm Baryon OmegaC* Decaying to OmegaC0 Gamma Observation of an Excited Charm Baryon OmegaC* Decaying to OmegaC0 Gamma

2006-08-24

arxiv.org/abs/hep-ex/0608055v2

Phys.Rev.Lett.97:232001,2006

Physics

High Energy Physics

High Energy Physics - Experiment

7 pages, 2 postscript figues, published in Physical Review Letters

Scientific paper

10.1103/PhysRevLett.97.232001

We report the first observation of an excited singly-charm baryon OmegaC* (css) in the radiative decay OmegaC0 Gamma, where the OmegaC0 baryon is reconstructed in the decays to the final states Omega-pi+, Omega-pi+pi0, Omega-pi+pi-pi+, and Cascade-K-pi+pi+. This analysis is performed using a dataset 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 OmegaC* and the OmegaC0 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 OmegaC* and OmegaC0 in e+e- annihilation.

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