Excited Q Baryons in the Large Nc Limit
Abstract
The spectrum of excited Q-type heavy baryons is considered in the large Nc limit. The universal form factors for b semileptonic decay to excited charmed baryons are calculated in the large Nc limit. We find that the Bjorken sum rule (for the slope of the Isgur--Wise function) and Voloshin sum rule (for the mass of the light degrees of freedom) are saturated by the first doublet of excited Q states.
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