Abstract
The values of Operator Product Expansion (OPE) parameters m b , m c , μ π 2 , and ρ D have been determined using first three moments of lepton energy spectrum and hadron mass spectrum in semileptonic B hadron decays by the DELPHI Collaboration at LEP. The measurement improves the accuracy of the inclusive determination of the value of | V c b | . It also tests the consistency of theoretical predictions and the underlying assumptions of the model.
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