Measurement of the Properties of $\Sigma _{b}^{(\ast )\pm }$ with the CDF II Experiment

I will present a measurement of the masses and natural widths of the four bottom baryon resonance states $\Sigma _{b}^{+}$, $\Sigma _{b}^{\ast +}$ and $\Sigma _{b}^{-}$, $\Sigma _{b}^{\ast - }$ reconstructed in the $\Lambda ^{0}_{b}\pi ^{+}$ and $^{ }\Lambda ^{0}_{b}\pi ^{-}$ decay modes, respectively. This analysis is based upon the data taken with proton anti-proton collisions at 1.96 TeV recorded by the CDF II detector for a total integrated luminosity of 6 fb$^{-1}$. A heavy baryon with two light quarks and a single heavy quark can be described as the helium atom of QCD. The heavy quark in the baryon may be used as a probe of confinement which will allow us to study non-perturbative QCD in a new regime. The natural widths of the states $\Sigma _{b}^{\pm }$ and $\Sigma _{b}^{\ast \pm }$ have been measured for the first time. The signal shape is modeled with a non-relativistic P-Wave Modified Breit- Wigner function.