First Observation of Bottom Baryon 
                 Sigma_b States at CDF 

                   Igor V. Gorelov
            (For the CDF Collaboration)

        Department of Physics and Astronomy
             University of New Mexico 

  Abstract:
  
  We present the latest results on the search of bottom baryon states
  Sigma_b using 1.1 fb-1 of CDF data.  The study is performed with a
  world largest sample of fully reconstructed Lambda_b decays
  collected by CDF II detector in proton-antiproton collisions at 
  1.96 TeV using the hadronic trigger path. For the first time we observe
  the four lowest-lying resonant states Sigma_b+/-, Sigma_b*+/- in the
  fully reconstructed decay mode of Lambda_b pi+/- .