First Observation of the Sigma_c^{*+} Charmed Baryon, and New Measurements of the Sigma_c^0, Sigma_c^+, Sigma_c^{++}, and Omega_c^0 Charmed Baryons

Details First Observation of the Sigma_c^{*+} Charmed Baryon, and New Measurements of the Sigma_c^0, Sigma_c^+, Sigma_c^{++}, and Omega_c^0 Charmed Baryons First Observation of the Sigma_c^{*+} Charmed Baryon, and New Measurements of the Sigma_c^0, Sigma_c^+, Sigma_c^{++}, and Omega_c^0 Charmed Baryons

2000-09-15

arxiv.org/abs/hep-ex/0009040v2

Proceedings of the 30th International Conference on High Energy Physics, Osaka, Japan, 27 July--2 August 2000 / eds. C.S. Lim,

Physics

High Energy Physics

High Energy Physics - Experiment

4 pages, LaTeX2e, 4 eps figures, uses style file ws-p10x7_clns.cls (included); adapted from version contributed to the proceed

Scientific paper

Using ~13.7 fb^{-1} of e^+e^- collision data recorded at near the Upsilon(4S) resonance by the CLEO II and CLEO II.V detector configurations on the Cornell Electron Storage Ring, we present the world's most precise measurements of the Sigma_c^0, Sigma_c^+, and Sigma_c^{++} charmed-baryon masses as well as the first measurements of the intrinsic widths of the Sigma_c^0 and Sigma_c^{++} baryons. We also report on the first observation and mass measurement of the Sigma_c^{*+} charmed baryon, M(Sigma_c^{*+}) - M(Lambda_c^+) = (231.0 +- 1.1[stat] +- 2.0[syst]) MeV/c^2, and the first CLEO observation of the Omega_c^0 baryon, for which we measure a mass M(Omega_c^0) = (2694.6 +- 2.6[stat] +- 1.9[syst]) MeV/c^2 from a sample of (40.4 +- 9.0[stat]) candidate events. All new results are preliminary.

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