/ Experiment-HEP arXiv:1112.2808

Measurement of the masses and widths of the bottom baryons $\Sigma_b^{+-}$ and $\Sigma_b^{*+-}$

Pages: 13

Abstract: Using data from p-pbar collisions at $\sqrt{s}=1.96$ TeV recorded by the CDF II detector at the Fermilab Tevatron, we present improved measurements of the masses and first measurements of natural widths of the four bottom baryon resonance states $\Sigma_b^{+}$, $\Sigma_b^{*+}$ and $\Sigma_b^{-}$, $\Sigma_b^{*-}$. These states are fully reconstructed in their decay modes to $\Lambda_b \pi+-$ where $\Lambda_b$-&gt;$\Lambda_c^+ \pi-$ with $\Lambda_c^+$-&gt;$p K- \pi+$. The analysis is based on a data sample corresponding to an integrated luminosity 6.0/fb collected by a trigger on tracks displaced from the p-pbar interaction point.

Note: * Temporary entry *

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