Measurement of Natural Widths of Sigma-c-0 and Sigma-c-++ Baryons

Abstract

In this paper we present a measurement of the natural widths of ${\Sigma }_c^0$ and ${\Sigma }_c^{++}$. Using data from the FOCUS experiment, we find $\Gamma ({\Sigma }_c^0)=1.55+0.41/-0.37\pm 0.38$ MeV/c^2 and $\Gamma ({\Sigma }_c^0)=2.05+0.41/-0.38\pm 0.38$ MeV/c^2. The first errors are statistical, the second systematic. These results are obtained with a sample of 913 ${\Sigma }_c^0\to {\Lambda }_c^{+}{\pi }^{-}$ decays and 1110 ${\Sigma }_c^{+}+\to {\Lambda }_c^{+}{\pi }^{+}$ decays. These results are compared with recent theoretical predictions. PACS numbers: 14.20.Lq 13.30Eg

Submitted to Physics Letters B

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