Observation of the h_b states and Beyond
  Originally designed for CP violation studies in the B meson system, the B-Factories recently showed an exciting capability for improving our experimental knowledge in the field of hadron spectroscopy. We review results on bottomonium spectroscopy from the Belle experiment at the KEK-B e+e- collider and present exciting new results from the unique large data set taken at the Upsilon(5S) resonance. 
A. E. Bondar
hep-ex