From a data sample of 242 000 BB{} pairs collected with the CLEO detector at the {Υ}(4S) resonance, we set upper limits for the branching ratios for exclusive hadronic decays of B mesons arising from b{→}u transitions. Model-dependent limits for the ratio of the Kobayashi-Maskawa matrix elements Vub/Vcb are presented.
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Bortoletto et al. (1989) studied this question.
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