We use recent Belle results on B¯0→D⁎+l−ν¯l decays to extract the CKM element |Vcb| with two different but well-founded parameterizations of the form factors. We show that the CLN and BGL parameterizations lead to quite different results for |Vcb| and provide a simple explanation of this unexpected behaviour. A long lasting discrepancy between the inclusive and exclusive determinations of |Vcb| may have to be thoroughly reconsidered.
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Bigi et al. (2017) studied this question.
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