Excited ΛQ Baryons in the Large Nc Limit
Chi-Keung Chow, Mark B. Wise
Abstract
The spectrum of excited ΛQ-type heavy baryons is considered in the large Nc limit. The universal form factors for Λb 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 ΛQ states.
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