First Observation of the $Σ_{c}^{*+}$ Baryon and a New Measurement of the $Σ_{c}^{+}$ Mass

Details First Observation of the $Σ_{c}^{*+}$ Baryon and a New Measurement of the $Σ_{c}^{+}$ Mass First Observation of the $Σ_{c}^{*+}$ Baryon and a New Measurement of the $Σ_{c}^{+}$ Mass

2000-07-20

arxiv.org/abs/hep-ex/0007041v1

Phys.Rev.Lett.86:1167-1170,2001

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS

Scientific paper

10.1103/PhysRevLett.86.1167

Using data recorded with the CLEO II and CLEO II.V detector configurations at the Cornell Electron Storage Rings, we report the first observation and mass measurement of the $\Sigma_c^{*+}$ charmed baryon, and an updated measurement of the mass of the $\Sigma_c^+$ baryon. We find $M(\Sigma_c^{*+})-M(\Lambda_c^+)$= 231.0 +- 1.1 +- 2.0 MeV, and $M(\Sigma_c^{+})-M(\Lambda_c^+)$= 166.4 +- 0.2 +- 0.3 MeV, where the errors are statistical and systematic respectively.

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