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Author: Zoltan Ligeti

Title: Theoretical Developments in Inclusive B Decays

Abstract: Theory Group, Fermilab, P.O. Box 500, Batavia, IL 60510Some recent theoretical work on inclusive B decays relevant for the model independent determi-nation of jVubj and jVcbj is summarized. The theoretical predictions and their reliability for severaldi_erential decay distributions in _ B ! Xc;ue_ _ and _ B ! Xs are reviewed. These can be used todetermine certain important HQET matrix elements. The upsilon expansion and ways of testing itare discussed.

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